I finally broke down and paid the $70 for a Bluetooth Mighty Mouse for my PowerBook. After all the bad reviews I have read I was a little worried. I now have 4 or 5 hours under my belt with it, and I like it a lot so far. I love the button placement, and the little scroll ball that can be used as a button too. I use it as Expose - desktop and it rocks. My only dislike is the “pressure sensitive” side squeeze button, which really is just a normal click button. Its just awkward to use, but maybe it works for some. The main feature I like is the fact thats its bluetooth so i don’t have to have a USB dongle for my mouse. I would say its a buy, check it out if you have a mac.