Bythom.com
Tom Hogan's extensive information on Nikon equipment, books and "How To" guides

Earthboundlight.com
Bob Johnson's northwest nature photography and great photo processing tips

kenrockwell.com
A professional photography with a sense of humor. Provides unlimited reviews of cameras, lenses, "how to" etc in his own indomitable way.

Nature Photography Online
Excellent resource for nature photography

Popphoto.com
Popular Magazine Online

Shutterbug
Shutterbug Magazine online