You might also consider visiting GelaSkins.com. They are a canadian based company that allows you to design (all online) your own skin for your phone. It has saved mine several times, as it protects the back from scratches. I have made several skins, ones for work with company logos and art, ones for personal with photos of the kids, and ones for WDW trips with pix of my book and iPhone app.
Technically they are re-usable, but they really are not. After you peel them off once, they are pretty wrecked. But they are a great, strong 3M material that keeps the dings off and makes the phone really fun looking.
Just a thought...