This is pretty damn funny.
I know there are a ton of free applications out there for webcams and motion detect. Problem is hiding the cam / computer. Find a wireless cam off of ebay or something and set that up.
The surveillance app turned out to be extremely buggy, and it doesn't dim the screen so that would completely blow cover. Downloaded Ustream and also something called Securet Spycam, although if you lock your phone the camera gets turned off. Anyway around this, or is there an app that allows the camera to function while the phone is locked?
You could get KeepScreen and set the uStream app as a "no timeout" app and leave your phone plugged in charging all night. Not sure if this would hurt the screen being on so long, though.