Is it possible to add GPS to this unit? Audio bluetooth would be nice as well. I took apart the unit and there doesn't seem to be any open "spots" where you can solder something in other than a HDMI socket. I see the android GPS classes are now exposed (maybe they have always been there) so I think if you connect a gps module, it could talk to the OS. Also, is there an accelerometer in this thing? I turned on debug which writes processes to the screen and I didn't see any classes that would indicate an accelerometer was firing events. How does that get turned on?