If you can live without your notes in your hand...

If you can live with having your notes on your laptop screen rather than in your hand, I would recomment getting the Air Mouse application. As with this application, you can control your Powerpoints without having to be connected to a separate Wi-Fi network. You can also control the rest of your computer. i-Clickr is a good application, but the $1.99 Air Mouse is of much greater value than a $9.99 program that can often be glitchy.

JTins about i-Clickr Remote for PowerPoint Lite