I see no reason why they don't sell these phones in different styles or at the very least battery doors in different styles considering how many ppls would be interested and taste seem to vary... they could at least have a limited release just to see how well it goes..
This is to show you the already many variations in the diamond and pro that I was able to find the back off. You would think some body would cash in since all these different designs already exist... Oh btw, the last two are the same phone, but its changes color (green to purple or whatever color that is) in certain light.
also notice the touch pros are the ones with the flash, and the sprint versions of the diamond and pro have 3.2 mp written on them when some of the others have 3.1.