Find my iPhone

A cool feature that came out with iPhone OS 3.0 today. Not sure it will help you find it while its in your house but it will at least track down what store/gas station you left your phone at.

For the house problem it has the ability to vibrate/ring (despite ring settings) for up to 2 mintes:

"Write a message that will appear on your iPhone's screen. You can also play a sound on your iPhone, even if it is in silent mode."

If you choose the sound option when its at somewhere like a gas station they'll get annoyed. Assuming you have security on your phone (a pin, which you should have or your whole life is exposed) then it will beep and vibrate continuously for 2 minutes and they can't stop it without the pin. They could power it off (I confirmed they could do this) if they know how to do that on an iPhone. I fear what they'd do otherwise...