SocWall
I haven't indulged my love of wallpapers for awhile now, so it is great timing to find this website which marries social networking with wallpaper for your computer. They even have an RSS feed with the most recent wallpapers. You can browse in a number of ways from the scale of the images (standard, widescreen, dual monitor) to a large group of categories. Rate the wallpapers you like, use them on your computer, and enjoy!