At least I think that it is. I would love to see a mouse app, that uses the camera and accelerometer to sense the movement. Thus you would hold it just like a desktop mouse. It should work, at least in theory. The combination would be perfect. Also, another mostly unrelated idea, how about a photo management app, that rather than onscreen touches, uses the camera and hand gestures to control the pictures. Just a thought. And is the SDK extensible enough to allow this? Would Apple allow it? I think that the last one would be more of a toy, but the mouse app, would be perfect. Of course you couldn't use a rubber case with the first, but still. I saw a DIY multitouch trackpad, and it inspired the photo manager idea.