Well there just like a1200/E6 themes are different from the a780/a680 but can be modified to work on each other. Really there are only two people who even know how to do what i have done an i am one of the two

. Im sure there will be people making themes for other android phones but it wont be easy an i don't know who. Get a G1 other android phones will be more locked down. I would get a Dev 1 which is open for all sims an has root by default also has a Dev boot loader.