I really like the idea of using the motor as a combined power source/user interface component! As the proud owner of a 2004 sedan, hacks to get digital audio on

I really like the idea of using the motor as a combined power source/user interface component! As the proud owner of a 2004 sedan, hacks to get digital audio on the original stereo are a common daydream of mine. Maybe Bluetooth low energy could fit in that power envelope too?