No. All you need your computer and your existing web-cam (builtin in most mac's).

Yes. EyeTwig doesn't require any special camera. As long as you can see yourself in the frame, EyeTwig will perform well.

We really wanted to be on the mac AppStore, but Apple has decided to deny any application that controls the mouse/keyboard (aka App Sandbox) .

EyeTwig focuses on real-time video and image analysis in general, and iTracker is our first product that is based on our technology. We have products for home security, military and online business transactions.