HOLY CRAP IT'S AWESOME I ordered it from skinit.com! [link] I couldn't find on how to design a case, but only the skin option was available. My phone is the first addition of the Galaxy S 4G. I really wanted a case, but having a skin is even better!
me and my roommate customized, and chose some photos we had on our computer. my roommate chose this one: [link] (you have to scroll down a lot to see it. it's the allies and italy, germany and japan, wearing scarves and the night is sparkly) mine is this one: [link] and we both chose skins instead of covers