BetterPhoto.com
Take fantastic online photo classes with world-class professional photographers, unite with fellow photography enthusiasts, or create a beautiful personal Web site like this one.

Digital Image Cafe
This is a contest and photo critique board that I belong to. It is a great photo community. The objective is to teach through on-line information and tutorials and for the user to learn using the "Critique Corner" where members make suggestions to help enhance the image and teach techniques.

You can see my gallery on Digital Image Cafe HERE

Ken Rockwell
Information about cameras, lenses and fabulous articles on photography. A wealth of information for free.

Nature Photographers Online Magazine.
If you want to join a wonderful online community that will help you with all your question, this is the one. Dedicated to nature photography, you will learn about places and techniques to use on your treks into the great outdoors.

Thom Hogan Nikon Site -- byThom
I had to include a Nikon only site. This is for Nikon lovers. You want to know anything about a Nikon camera or lens, or just about anything else Nikon makes, here is the site for you.