I love Bluetooth. I can sync my computer’s address book to my phone without so much as taking it out of my pocket, and control iTunes from across the room if I do.
BUT beware, mean spirited geeks (the kind you may have once seen hanging from their underpants in the locker room) have not only figured out how to hack the precious info off your phone, but how to do it from over a mile away! They can even plant fake text messages, and use your phone as a listening device by having it call them. fooey.

http://www.wired.com/news/privacy/0,1848,64463,00.html
and
http://www.thebunker.net/security/bluetooth.htm