Presentation Manager
For Presentation Remote to work, you'll need a small helper application, Presentation Manager, running on your Macintosh. Presentation Manager is how you give permission to iPhone or iPod touch devices to control your presentations.
Presentation Manager also includes a Wireless Signal Tester, to check the approximate speed and quality of your network.
This is completely free, and you can download it here:
Presentation Manager requires Mac OS X 10.5 ("Leopard") or 10.6 ("Snow Leopard").
