I’m giving a lot of presentations, and having to stand next to the notebook makes for a bad presentation style.
A few weeks ago I admired a colleague using a wireless presenter, and I got the same one: The Logitech Cordless 2.4 GHz Presenter. Installation was a breeze: no drivers required, put in the batteries, plug the USB dongle into the laptop, and you’re ready to go. You can start/stop presentations (F5), switch back and forth, blank the screen or use the laserpointer. Additional feature: it has a time display that counts down your presentation time and will make the device vibrate 5 minutes before your time ends.
Oh, and I got it off eBay, where the price was about half of the suggested retail price… Nice.