What about a gyroscopic mouse? (Score 1)

I can't remember the name of the company, but they produce a wireless gyroscopic mouse (which can also be used as a regular optical mouse). You hold it kind of like a pistol's trigger, and just move your arm (or wrist, I can't really remember unfortunately) to move the cursor around the screen. It comes with a desktop charger, so you don't have to worry about constantly changing the batteries. Hope this helps some.