I am about to buy a magic mouse to use with our iMac (if the local store has one). Most of the reviews are very positive, but slow tracking seems to be a major problem. I really do not like a slow mouse; really exasperating! I read that an existing program, "MouseZoom" can be used to speed up the mouse tracking. Could anyone tell me if they have used MouseZoom, how hard it is to set up, quirks, etc.. We are using an iMac/Snow Leopard. Thanks, Dave