Architectural interest
http://www.aecnews.com/ on-line journal offering continuing stories and reports on the BIM evolution.
Archibot.com Architecture News site for architectural project news.
http://archnet.org/ a rather expansive digital photo library of architecture from around the world.
The ArchitectStore site for architectural books.
Architects USA site for architects to register with or for those looking for licensed architects.
http://www.bdonline.co.uk/story.asp?storycode=3083553 - I added this link for an award on the worst "archi-speak" or "archi-babble" because it just cracks me up.  
Construction.com on-line portal for the construction industry with information on CAD and Architecture
Death By Architecture Competitions, Links, Jobs, Design Projects
DesignArchitecture a good on-line magazine about Architectural Design not CAD
Educating Architects for a Sustainable Environment new site of possible interest...
http://www.fenceonline.com/ this site has lots of great specifications that helped in developing Fences 5.  
Green Map System Uniting people to map and promote green spaces around the world.
http://langorigami.com/ origami folding as a science and inspiration to us all.  
Lego's Digital Designer always a fan of the toy that consumed countless hours of my childhood - see the software that lets you construct and then order the parts.  
http://www.leica-geosystems.com/ laser based distance meters are getting better and better but there are still jobs where I have to use old fashioned tape.  
smart car from DaimlerChrysler this is a really cool car we spotted in Spain this summer.  We only wish it was available in the US.
www.skyscraper.org Cool collection of information on the history of skyscrapers in the world.
http://www.solibri.com/ - take a look at the future of BIM  
Microsoft TerraServer Satellite images of Earth up to 1.5m all over the world. Here's a direct link to San Francisco.
The Visual Library "Internet for the AEC Community". A Sweet's like Web directory with downloadable AutoCAD details.
AutoCAD® Autodesk and places to visit at Autodesk
Autodesk - AutoCAD Architectural Desktop - Support and Training site to keep an eye on for patches and other ADT issues
Autodesk - AutoCAD - Support and Training site to keep an eye on for patches and other AutoCAD issueshttp://betaprograms.autodesk.com/betaweb.htm
Software for AutoCAD and AutoCAD Architecture
1ST Pricing price scheduling technology for AutoCAD  
http://amslonline.com/idrop.asp i-drop trim profiles; pretty cool!  
anySOFT Applications for AutoCAD and ADT; Level Mark and Datum Manager.
AutoCAD Shareware Clearinghouse a site of amazing AutoCAD solutions.
AutoCAD Utilities - a site of AutoCAD solutions.
AutoSolids - Powerful AutoCAD 3D design and solid modeling add-on software.
http://caddee.com/layerlist.html AIA Layer Name List for all disciplines.  They also have a slick Layer Tool for AutoCAD users.
http://www.caddevelopmentgroup.com/downloads.html a couple of nice add-on's for AutoCAD, like a Purge utility and Case Fixer - and they are totally free. 
http://www.cadlogic.com/ add-on solutions for ADT (UK especially), AutoCAD and AutoCAD Lt - good stuff here.
Cad Nauseam - a site of AutoCAD solutions.
CADPIPE - a company offering ObjectARX piping solutions for the A/E/C industry.
http://www.cadro.com.au/hatchkit/ customizable hatch pattern tool for AutoCAD.  
www.cben.net on-line CAD Block exchange with i-drop content for AutoCAD.  
http://columbus.arup.com/info/ screenshots.shtml awesome document management software for AutoCAD and ADT and its FREE
DotSoft - a site of great shareware/freeware and payware for AutoCAD - put this on your favorites and visit regularly.  A great Schedule tool and more.
DTI Technologies - productivity tools for Architectural Desktop
Eagle Point - a software company that offers 3rd party architectural software for AutoCAD® and IntelliCAD® and produce LandCADD for landscape architects.
EasySite - Site Modeling and Visualization tools for AutoCAD 14, 2000 and Architectural Desktop.
GlobalCAD released two new updates to their Toolbox  LT (AutoCAD Lt ) and to LandARCH 2006 for Landscape Architects using AutoCAD Lt, AutoCAD or Flavors of AutoCAD.  Download their Press Release (with images)www.globalcad.com/ downloads/GCADPRLO.zip  
www.HatchPatterns.com - Site of free and low cost AutoCAD hatch patterns
www.hsb-cad.com Add-on's for timber framing, log home construction, conventional framing, trusses, SIP construction, Glue Lam construction and CNC code for wood working machinery
http://www.kclcad.com/ AutoCAD based foodservice equipment symbol libraries with numerous drawings in full 3D but I saw nothing specific for ADT.  
Ketiv Technologies - a software company that offers 3rd party software for AutoCAD® and IntelliCAD®
Nemetschek Systems, Inc - 3rd party 3D modeling architectural add-on for
http://www.m8tools.com/ website offering free and fee based routines for AutoCAD and Flavors.  Their Batch routines are well known in the AutoCAD community.  
Manusoft a site of AutoCAD solutions.
www.multicim.com/pmenu.html custom menus for AutoCAD 2000 and 2000i - free trial.
http://www.playworldsystems.com/ pw/plan.asp playground design tools for AutoCAD  
ProSteel 3D Structural Steel,  ARX based,  plug-in for AutoCAD 14, 2000 and Architectural Desktop.
Robert McNeel & Associates architectural add-on's for AutoCAD like Facade, a quick 3D architectural modeling program.
www.scadd.com offers a product for AutoCAD that helps create, maintain and enforce drafting standards.  If you haven't heard of SCADD it may because their focus is primarily on Structural Engineering.  
www.StoneCAD.com cool stone hatch patterns for use in AutoCAD and Architectural Desktop.
TCS AIA Layer Creator a custom AIA based layer creator for AutoCAD.
The CADDEPOT CAD, free autolisp, arx, ads, vba, shareware downloads. Free online help, BBS, links and support
3DPowerTools extra strength modeling tools for AutoCAD 2000 and Architectural Desktop.
http://www.quickpen.com/ QuickPen announces DuctDesigner 3D® and PipeDesigner 3D® for AutoCAD 2007, Architectural Desktop 2007, and Autodesk Building Systems 2007.  
Sites offering Software for AutoCAD LT.
www.drcauto.com Smart Architect LT 2000 - a product for 2D and 3D architectural work in AutoCAD LT 2000
www.pendean.com/lt/products.htm custom menus, patterns and routines for AutoCAD LT.
REAL Architect an architectural add-on program for AutoCAD Lt.
AutoCAD Architecture
http://www.allsheets.com/ powertools for ADT
http://www.archvision.com/RPCDemo.cfm Archvision now has a plug-in for Architectural Desktop 2004 for Real Trees, People and so on.  Great stuff but costly
http://www.cadaptation.com/ offers a batch editor for ACA Object Styles that could save you a bit of time.  
http://www.constructionindustrysolutions.com this company offers a framing solution for Architectural Desktop 2004/2005 but I have no idea how good it is.  
http://www.e-architect.net this relatively new website is dedicated to serving Architectural Desktop users in Portugal and Brazil or anyone else who reads Portuguese.  
http://www.marinsoft.com/ manufacturers/ manufacturers.htm i-drop content for ADT based on industry standard products.
http://www.jtbworld.com/index.htm informative website about AutoCAD and AutoCAD Architecture.  They offer a variety of interesting tools.  Check out their Blog as well.
http://www.cadlogic.com/ - add-on solutions for ADT (UK especially), AutoCAD and AutoCAD Lt - good stuff here.
http://area.autodesk.com/index.php/ downloads_textures/textures_list/ - a render map depository that you may not know about.  
http://www.visionrez.com/ full-core residential package for AutoCAD Architecture.
AEC CAD Companies
ArchiCAD by Graphisoft www.graphisoft.com/ a serious competitor to Architectural Desktop with a large list of superior tools and capabilities.
http://www.gdlalliance.com/ Tools/ adaptertool.html the GDL Alliance has created a tool that will allow access to the great GDL objects for ArchiCAD users.
Allplan FT by Nemetschek www.allplan.com/en/nemcom.nsf arguably the best architectural software available today but not well known/used in America.
VectorWorks by Nemetschek  www.nemetschek.net/ a solid competitor to Architectural Desktop.
FormZ by autodessys www.formz.com/ amazing freeform 3D surface modeling program for architecture and product design.
SketchUp a great 3D Sketch-Based modeling program that can import AutoCAD and Architectural Desktop files.
CADalytic Media specification information from the McGraw-Hill Construction Network®.  
SoftPlan by Softplan Systems, Inc. www.softplan.com a 3D Residential CAD program that offers astounding output in terms of CD's, Reports and even Presentation.
Magazines, e-Zines, Portals, etc.
http://architects-desktop.blogspot.com/ David Koch's blog is quite informative about AutoCAD Architecture.  
http://ausaca.blogspot.com/ - Nathan Ellery's blog offers a lot of very detailed and specific information for AutoCAD Architecture with an emphasis on Australian use.  
http://bimology.blogspot.com/ Tomislav Zigo is coming up with some rather interesting tricks for ADT/ACA and I recommend that you read his blog; particularly his article on Project Navigator based control over Wall Heights.  
CADALYST a General CAD magazine
CADENCE a General CAD magazine
http://www.cadgurus.com/default.asp another site for all sorts of CAD related information and downloads.
CAD-Portal The Internet Resource for Engineering Professionals.  A great source of news and information for the engineering CAD user who looks beyond AutoCAD.  Good news letter too.
http://davidddriver.com/index.htm offers a lot of services for AutoCAD, ADT and Revit users.  My clients have found his webinars exceptional.  
CAD Digest a great portal site for all sorts of CAD news.  
CADwire.net another great portal site for more CAD news.  
http://www.galiciacad.com/ Portuguese CAD portal with lots of content for 2D and 3D AutoCAD use.
CADserver a good on-line magazine for a different and often more honest perspective on CAD.
CADSystems Online Magazine focuses on the mechanical side but is quite interesting.
DESIGN4 a magazine and website covering 3D Studio subject matter.
Digital CAD light reading for CAD users spanning from general CAD news to specific tips.
Metropolis Magazine site of a paper based magazine that offers not-so-suburban design concepts and examples; spanning topics from buildings to dance.
newmedia a more generalized magazine about the world of digital media. Good source for information on non-CAD presentation software (like VRML).
upFront.eZine a site for great literature about AutoCAD and CAD in general and a site with a kindred spirit.
Organizations
Association for Computer Aided Design in Architecture a non-profit group comprised primarily of professional educators promoting Design with CAD rather than Drafting. They offer a newsletter, competitions, links and more.
AutoCAD User Groups (Bay Area)
Marin AUG
Napa AUG
San Francisco AUG
San Jose AUG
Sonoma County AUG
Autodesk, Inc. - McInnis Parkway, San Rafael, CA 94901 (415) 457-0220
103 Camino Oruga, Napa, CA 94558 (707) 254-9661
http://www.3darc.net/ site offering listings of professional modeling and rendering firms with sample images and more.  Pretty cool for those looking to hire and those looking to advertise their skills.
Photoshop for AEC
Artchitect one of the coolest sites for demonstrating the power of mixing CAD and Photoshop.  Check this work out!
http://www.scottonstott.com/ among other training solutions, Scott has a DVD on Photoshop for architectural presentation work - see comments above.  
Revit
http://www.workflowcompass.com/Home.aspx document and content management software for Revit.
     
SketchUP
http://www.suplugins.com/index.php?p=home a photorealistic rendering plug-in for SketchUP.  
http://www.smustard.com/ add-on tools for SketchUP
http://www.renderplus.com/htm/render_plus.htm Rendering Tools for SketchUP.
Student Discounts
http://www.studica.com/ Great Source for discounted software for Students and Faculty
Tutorials
http://www.cadtutor.net not only does this site have some great information on using Photoshop and CAD but also on a large list of other CAD topics.
http://www.dgcad.com/ADT2004 Level1.htm video tutorials on ADT  
http://www.lgu.ac.uk/ CAD/be2002/ tutindex.htm tutorial on working with ADT and Viz.
VRML
Construct An amazing assortment of VRML experimentation and information. A must-visit site for creative thinkers interested in exploring the possibilities of virtual space.
VRML Consortium The mother load of VRML information and leads to other sources.
The VRML Repository More great information on VRML with links and a supply of donated materials, sounds and models.
Web Presentation
www.flashkit.com awesome flash site with amazing examples of where this technology is going - even games.
http://www.friendsofed.com/fmc/ really interesting flash movies based on simple mathematical formulas.
3D Studio® Max / Viz & Related Software Autodesk and places to visit at Autodesk or Discreet
Discreet - VIZ Online - Home home site of 3D Studio Viz.
Autodesk - Technical Assistance - 3D Studio VIZ Site for updates, patches and related information.
Discreet - VIZ Online - Downloads and Updates
http://www.accustudio.com/ great resource for Presentation people
ArchSoft, Inc amazingly real people and trees.
Blur great site layout, tough attitude, 3D studio plug-ins and cool sample work.
http://www.brick.com/md/index.htm use this tool to build a variety of brick patterns to show clients or to use for rendering materials.  
www.cgarchitect.com a really good source for Viz information
http://www.digi-element.com/index.shtml WorldBuilder and Aurora plug-ins for Max and Photoshop to help create natural landscape effects.
Digimation number one producer of plug-ins for 3D Studio
id8media site of great 3D software including 3D Studio plug-ins.
Max3D site with great on-line 3D Studio Max tutorials, resource links and more.
http://www.m3corp.com/ a site with numerous textures for Rendering.  
Viz2000 a new portal site for Viz users with lots of links, articles and other great information.
Webreference more free tutorials on 3D Studio and news on events in the 3D Studio World.
3dcafe site of cool plug-in's and links.
3Drender a site with great 3D Studio Max tutorials and insights.
http://www.splutterfish.com/sf/ impressive Rendering plug-in for Viz and Max
3D Images
http://www.got3d.com/index.html this site has a great collection of images and textures to spruce up your renderings.  You're going to need things like this if you plan to Render in AutoCAD 2007 because they dumped the Landscape Library and Tools.
3DShop - 3D Image Gallery - very nice collection of rendered  images.
3D Object Libraries
www.hermanmiller.com continues to add great i-drop content that you can use in AutoCAD, ADT, Viz, Max and other products.
http://home.t-online.de/home/sven.schelhorn/ htmsites/framecol.htm for some outrageously detailed 3D Models of BMW's and Mercedes.
http://www.e-interiors.net check out this site for 2D and 3D objects for interiors.
http://www.doschdesign.com/ products/Dosch_CAD  3D Models for CAD.
http://www.onyxtree.com/conifer.html this product makes amazing trees.  They can be imported into ADT/ACA via 3DSIN but can also be large in filesize and will require some work to convert into usable MvBlocks.
http://www.autodrop.net/ on-line library of objects for AutoCAD, Architectural Desktop and Viz...just drag-n-drop.
KOHLER CAD Symbols check out the ADT MvBlock on-line library in i-drop format.
Other Miscellaneous Interest
http://www.ibizcorp.com/ a laser keyboard; now that's innovation.
http://www.holisticcity.co.uk/index.php - master planning software that has nothing to do with AutoCAD.  
http://www.tinyapps.org/ a site of small software applications that prove code does not need to be large and sloppy.