These cases are a combination of a clear plastic bumper that contains the iPhone and a custom aluminum backplate with the photo of your choice. I had one made with a sample cover of our iPhone Life Magazine. You could make one up with your photo, business card info, and even a QR Code! Imagine just holding your iPhone up to have someone scan your contact info or business URL!
They also make cases for specific Galaxy phones.
A nice feature is you could swap out aluminum prints as desired. Maybe have one with your favorite football team and then swap in your favorite baseball team when the season arrives!
Check out their printed aluminum products, beyond iPhone cases, at http://www.chromaluxe.com.