Last Updated Jul 1, 2009 11:19 AM EDT
Instead of buying and bringing extra gear, why not go the app route? Mobile Air Mouse turns your iPhone into an air mouse, perfect for remotely controlling presentations (and your PC).
The app leverages the iPhone's accelerometer to control your mouse cursor and offers a variety of media- and Web-control buttons. It also provides a full keyboard, complete with function and arrow keys.
MAM relies on Wi-Fi to communicate with your Windows or Mac PC (the required server utility is available for both platforms), but it can also work over 3G if necessary.
Want to see the app in action? Check out CNET's video review of Mobile Air Mouse. When you're done, you'll almost certainly want to make a beeline to the App Store, where Mobile Air Mouse --normally $5.99 -- is currently on sale for $1.99 [iTunes link].
Either way it's a steal, as you could easily pay upwards of $150 for a traditional air mouse that does a lot less.