I bought the Microsoft Wireless Notebook Presenter Mouse 8000 the other day. I'm quite fond of Microsoft input devices, I have their USB keyboard / mouse combination at work and at home. I bought the Presenter 8000 because I'm giving a lot of talks and I thought a little presenter mouse would be good. The 8000 operates normally as a 4 button scroll-tilt mouse, but then it also has presenter buttons on the underside.
It's a bluetooth mouse so I thought I would be able to just use my internal bluetooth drivers on my Mac PowerBook G4. Unfortunately while most of Microsoft's mice are totally Mac-compliant, the 8000 doesn't properly register itself as a Bluetooth mouse and you need to hack it somewhat to get the Mac to recognize it. I found the solution on Mac Rumors: http://forums.macrumors.com/showthread.php?t=249841&page=2 in a posting by viper0440 (scroll midway down).