Wireless Control for Presentations?

Bifurcati asks: "I recently bought a Bluetooth enabled Powerbook G4 laptop, which comes with a trackpad. I often give Powerpoint presentations, so I'm interested in getting a wireless controller, to flip back and forward through slides without touching the laptop. Google turns up many options, e.g., Honeywell's, Beamplus and this doohickey. Another option is a combined mouse-controller, throwing an external mouse into the bargain. There are wireless mice (e.g., Logitech's) which need a USB plug-in, but are short range. Or there are Bluetooth mice, like the X-Wing, which are neat and have a 10m range, but seem to be a pain with battery life/charging. Another option is Logitech's Bluetooth Presenter, which is a mouse, PP controller and laserpointer in one (but costs $200!). So many choices! So I'm turning to good old Slashdot. All of you presenters out there, do have favourite remote control devices? What are your experiences with using them? What type of connectivity is the best (wireless, Bluetooth, something else?!) And what about devices that double as an external mouse, or even as a controller for movies, iTunes, etc?"