You wanted bluetooth in your car, right?
This falls under comptuers and security. A new tool has been released that makes it possible to eavesdrop on and send audio messages to, the interior of some vehicles with bluetooth enabled with an insecure default password. Car Whisperer basically takes advantage of the fact that most bluetooth enabled cars set the default passkey for the bluetooth to 0000 or 1234. All it takes to eavesdrop, or send audio messages is a directional antenna and laptop running linux with this program. Of course, bluetooths range is rather limited, but it gives something to think about.
It is funny to think of the implications – piping “have you ever heard of a turn signal” to the car in front of you that went from 50 – 0 in 3 seconds for a turn. I wonder how many people have cars with bluetooth in their car and don’t even know about it? From what I read in another source, the range with a directional antenna can be made as long as a half mile.