Here's an amazing story I read yesterday in the newspaper:
An iPhone was stolen by a thief, who tried to unlock the password for a couple of times.
What the poor thief didn't know was that the owner of this iPhone was quite a techie; the iPhone was jailbroken and included a nice little app called: iGotYa.
iGotYa runs in the background and takes a picture (front camera) every time an unsuccessful attempt is made to unlock the password protected lock-screen and sends it to a pre-configured email.
The owner of the iPhone did not settle with the emails alone, he used another powerful technology tool: social networks. He kept publishing the pictures of the thief in facebook asking his friends to share them with their own friends.
After a couple of hours it paid off: someone recognized the thief standing next to a bus station and reported about it to the police – the thief was captured.