Organizations
American Council of Engineering Companies
American Institute of Architects - AIA AIA news, publications, services, and e-Architect, which offers career resources, project leads, research and reference, continuing ed, building projects, and more. (aia.org and aiaonline.com have been combined into one Web site.)
American Society of Interior Designers - ASID Assistance in finding an interior designer.
Building Owners and Managers Association - BOMA News, links, publications, government affairs and much more.
Corporate Real Estate Network (CoreNet)
International Facilities Management Association  IFMA's official Web site.
National Association of Industrial and Office Properties (NAIOP)
National Association of Women in Construction (NAWIC)
Society for College and University Planning (SCUP)
The Society for Marketing Professional Services The SMPS National site.

Publications
desigNEWS Interiors oriented info; good archive of articles.
Engineering News RecordOnline construction weekly; includes directory of firms.
Giant Robot.com - Asian American Pop Culture and Beyond
How.com Design, Creativity, Business

Blogs
Brand Autopsy  A Marketing Blog by the Marketing Journal
Seth Godin's Blog
The Virtual Handshake Blog
Institute for Research in Construction - IRC

Resources
Dirtpile.com General resource for the construction industry, including bidding, software, and professional services information.
InDesign Support Center
Institute for Research in Construction - IRC
ProFile A searchable database of 20,000 firms.
R.S. Means - Means On-Line Features construction costs and reference resources.
Word of Mouth Marketing Association