The guys from idnes.cz posted a demo of a Bluetooth controlled car. Apparently, a Nokia Symbian-based smartphone is used, and the application uses navigation keys for turning the car and two buttons for braking and acceleration.
I remember that few years back, Sony Ericsson had the small toy-car which was controllable via Bluetooth. But, this is everything but a toy, as you can see from the photo.
UPDATE: This was April Fool’s joke. (via: SlashPhone) 🙂