[ame=http://www.youtube.com/watch?v=xZzYtuTucGE]YouTube - Launch App When You Plug In Your iPhone, iPod Touch, or iPad - iOS Vlog 236[/ame]
PluggedIn is a neat tweak for your iDevice that launches an app when you plug it in. So lets say you have a favorite clock app or Nightstand that you use when you go to sleep. You can have that app launch right when you plug it in to go to bed, or even when you just plug it in to charge. If you leave your device for charging and just want to look at the time, you have a pretty expensive alarm clock there. Be sure to check out PluggedIn in the Cydia Store for $1.99.