[mikester]

They are already widely used in cars to track engine performance. Recently my boss couldn't get his car smogged because it was failing the "previous data collection available" test. There wasn't enough data in the computer for him to pass the test (he'd had the battery dead and disco'd for a couple of weeks). He drove it around for a week and it was able to pass finally.

Also, as far as GPS is concerned I believe that lowjack and On-Star both use that technology so you could already be being tracked unless there is a privacy disclaimer stating they WON'T track you. I'll never by a car with that in there unless there is some safeguard to that information that prevents it from being used against me or to track me. Then again, I think I should be able to buy and airline ticket without ever showing an ID if I pay cash. It doesn't matter WHO I am as long as I don't have anything that I shouldn't have on the plane right?