Photography organizations:
apanational.com - Advertising Photogrpahers of America
Stockartistsalliance.org - Stock Artists community and advocacy
Editorialphoto.com - Editorial Photographers (EP)
lightstalkers.org - Online Photographic Community

Other professional organizations:
adcglobal.org - Art Director's Club New York
AIGA.com - American Institute of Graphic Arts

Services/Promotions:
Workbook.com
blackbook.com
lebook.com

Informational Sites/magazines:
Dpreview.com - Review and forum fordigital cameras and technology
Fredmiranda.com - Reviews forum and photoshop plugins
adweek.com - AdWeek Online
adage.com
pdn-pix.com - Photo District News Online
commarts.com - Communication Arts Online