Have you heard of Society6?
This website has a growing community of artist from around the world. Its a place where artists can submit and sell their designs. The illustrations and photographs are available in the form of iPhone & laptop skins, prints, canvases, tshirts, and iPhone cases. I spent an hour just browsing through, trying to decide what design I should order for an iPhone case. Anyways here are some neat designs I found on Society6.