I’ve been looking for photography site that either have online course or have a place you can post pictures and get feedback or ask how they were made. Haven’t really found that yet but I found a couple of sites with cool pictures.
One is part of Photo.net where pictures get rated. There is some great stuff here. The posters seem to be professionals or at least serious photographers.
The other is diviantArt which covers all kind of art. I got there via a post to the h-twon blogs mailing list and a post by Elaine. They have a photography section. Here we seem to have more non-professionals.