If you're in a crap neighborhood where smash-and-grab burglaries are a problem, maybe this thing saves your 360 even if the rest of your stuff's stolen. Chances are, you got ripped off just buying it.
This first-ever Security Kit is $29.95 worth of common stuff you can buy at a hardware store for a lot cheaper, plus one custom-fit bracket. That attaches, naturally, in the back near the fan, which is just another thing to terrorize your RRoD-paranoid mind if you don't have a Jasper board.
It does not, of course, protect your hard drive, your $150 Tournament Edition Street Fighter stick, your full set of Rock Band instruments - you get the idea. In fact, here's a better one: Spend the dough on renter's insurance.
Protect Your Xbox 360 with Security Kit [360Sync via Joystiq]