BT Trackit
British Telecomm wants to make sure your car doesn’t drive away without you…if you live in the UK. To this end they offer the BT Trackit system which, once installed, checks for a signal from an emitter you carry on you. If you and your signal are present, off you go. If your signal is absent then the location of your car is sent to the authorities and you are contacted with the lovely news that your car has wandered off without you.
Via Engadget