Custom iPhone case

I recently saw that Tmobile came out with a new sidekick with which you can customize the shell of the phone. You just upload a picture or use the templates they have and order it. I was wondering if there is anything like this for iphone cases. I would love to be able to customize the graphics on a hard case for my iphone. The closest thing I found were customized skins but they are just stickers. The other custom designs I saw were leather and over $200. I want something like my agent 18 case but where I can customize the color and graphics.