This one I saw earlier:
http://j0hnmcclane.deviantart.com/gallery/28024536

These I also saw just now:
http://www.ecaseshop.com/advanced_se...ea1d70&x=0&y=0

I'd imagine the golden one would be an interesting choice for painting as it might introduce a "pearl effect"...
The chrome parts would have to be sanded with some really fine paper for painting though, but that shouldn't be too difficult, at least as those don't look like they introduce the transparent plastic covering the display?