I was reading this amazing story on TUAW about a man named Sean Power who tracked down a thief that stole his 17″ MacBook Pro using the open-source and free Prey (available on Ubuntu, Mac, PC, Linux, and Android).

The app, which I had never heard of until today, is a free alternative to the slightly more well-known Undercover (Mac) that does essentially the same thing but at a price. Prey is free for personal use and seems to do its job well. I’ve got it installed on my own computer now and will anxiously wait for the day I get to do some investigative snooping around (just kidding, I don’t ever want my laptop stolen).