[NefCanuck]

I'll just add that if your worried about using a mouse because of the range of motion needed, there are several mouse alternatives that might work better. A touchpad for example. or what I use instead of a standard mouse:

Gyration cordless mouse

This mouse let's me wave it in the air like a magic wand, no desk space required! (and it reduces wrist fatigue too :) )

NefCanuck