I just picked up the new Microsoft Wireless Notebook Presenter Mouse 8000 (phew!) because it has this really cool packaging that consists of the mouse in a plastic carrying case spinning inside the blister pack. Oh yes, it also is a presentation remote, laser pointer and uses Bluetooth.
Getting it working under Vista on my Lenovo X41T was a piece of cake and I was able to use the machine's built-in Bluetooth hardware instead of the supplied dongle. Getting it working on the MacBook was more problematic. A good set of instructions can be found here.