There have been gyroscopic input devices around for ages. One brand that comes to mind is 'Gyration' ...I believe Logitech did/does make a gyroscopic/air mouse also. However, don't know where the patents lie.
Also, the Nintendo DSi has a front-facing camera, and is a handheld (gaming) device. It actually has a camera in both directions. Seems like a simple enough patent there are probably others already out there, if not similar (or who filed first?).
How bout this, do what we say and we'll be happy satasifies costumers and put the damn camera on it ffs. Jesus Christ on his throne is it that fing hard? No it's not so do it and ****.