Anyone using the Magic Mouse yet? I like the diagonal scrolling of the Mighty Mouse's scroll ball, but having to clean it twice a day to keep the scroll up functionality is getting old. It also sometimes gets confused from RF frequencies from other equipment in my office, and goes spastic with the 4th button clicking. Does the Magic Mouse have that same problem? Does it have the same amount of buttons? Does if feel as good to work with all day in pro apps?