New to iPhone, an application that utilizes the GPS functionality of the device to show you that you're surrounded by creeps and perverts. (As if you didn't already know.)
Offender Locator, for the mere price of 99 cents, will give you a real-time Google map of every registered sex offender in your immediate vicinity, including their address, name, and offense.
Clearly the possibilities are vast. Next up will be a version that taps in P.A.C. databases so you can know if you're walking through a neighborhood of like-thinking people.