Really cool. I was just playing with it and my girlfriend walked over to ask me a question. I held up my hand to my computer as if to say "Hold on, computer."
It was a bit surreal. Very cool. Can't wait for more gestures or a generalized way to program my own gestures. I would love to be able to gesture "Switch to iTerm.app" by doing an OK sign or something. Sign language letters maybe?
Anyway, thanks. Really enjoy it already, can't wait for more. Also, I would pay money for this. If it had all of the play/pause/forward/back functionality I think I'd give you 4.99 if it was accurate. Just sayin'.