BlueputDroid is an Android app that lets you connect your phone to a Playstation 3 or some computers via a Bluetooth connection, and use your phone as a wireless keyboard and mouse. The app requires root access, and doesn’t work on all Android phones or with all PCs. In fact, right now it’s reported not to work with OS X or Windows and only supports computers running Linux, but the developer is working on fixes.
The app is available as a free try-before-you-buy download from the Android Market, but if it works for you, you can buy the full version for $2.81.
You can find a demo video after the break, and more videos along with a compatibility list at the xda-developers forum.