At the recent Boing Boing Ingenuity Conference in San Francisco, Super Awesome Sylvia and her dad, Tech Ninja teamed up with Joe Grand and Ben Krasnow to use the data stream generated by driving a car to create input for the WaterColorBot. Largest. Brush. Ever.
Over at Boing Boing you can read more about their hack, which took grand prize for the hack day.
Nice work. The project instantly took me back to a beautiful BMW commercial from a while back http://www.youtube.com/watch?v=BeWK0Aplpg8