Bluetooth is one of those services that highlights the fact that people are willing to give up security for convenience. Last night I realized just how convenient it is. This is my first phone with a Bluetooth headset. It also has voice dial which I've gotten into the habit of using. I parked in front of a store and called my wife while I walked in. It wasn't until I was in the dairy section that the call dropped out and I realized that my phone was still in the car. (heh)
In any case, here is a large link page for Bluetooth-related info.