Probably one of the oldest sites devoted to photography there are some good beginner forums and articles here. Check out the learning sections and the individual forums for some good discussions.
Fred Miranda forums
Fred started out and still develops PhotoShop actions but I like the forums and weekly image contests.
Luminous Landscape What's New
This site is the only photography site listed in PC Magazines's list of the top web sites. Outstanding tutorials, essays and reviews.
Rob Galbraith's main site for news and the forums. Also the reference for memory card performance in digital SLR's.
Digital Photography Review
Probably the best source for news and reviews on new digital cameras and accessories. I usually avoid the forums in favor of Photo.net and Fred Miranda.
The Radiant Vista - wonderful site to explore your photography and learn more. Daily critiques and weekly workbenches as well.
What the Duck - Adventures of a photographer Duck. I like to start my day by reading the comics and now I have one to read that's photography related. If you're not into photography you won't get many of the jokes, but if you are...
National Association of Photoshop Professionals - for more photoshop info than you know what to do with. Membership required for the good stuff and worth it.
JPG Magazine - JPG is a magazine. It's published 6 times a year by 8020 Publishing. Check out the back issues. Everything in the magazine comes from you!