I submit photos to this site. A lot of very talented photogs post here. Pics sorted into 4 diff categories, winners monthly. Overall winner gets a nice camera, runner ups in each category get a not as nice camera, i believe. Of course with any contest site, there is a lot of really really crappy pictures, people just wanting to share pics and not exactly hoping to win anything.
SOA PHOTO
http://www.soaphoto.com/contest/gallery/gallery.asp