CrazyPC controls a software server installed on a friends computer that can make the computer display images, play sounds, change the computer volume, and shut down.

Whats odd about CrazyPC is that its currently in the official App Store for $0.99, and its been there since September 7th. On Cydia its free and available in the BigBoss repo. SpyKey used to be available on the App Store, but was pulled by Apple.

Here's some random shit you can do:

Have fun :p

*Thanks to iJailbreak for info & pics