Claghorn:
I'm kind of annoyed at the choice of a broadcom chip which you aren't actually allowed to find out everything about without doing a deal with broadcom and signing NDAs (and probably paying a fortune). Seems counter to the sort of thing the project is supposed to be about (but no doubt it will be fun for people who like to reverse engineer things :-).
Ok, what other ARM+GPU could they have used that has an open GPU datasheet?