A cam Google could develop for YouTube video filming. It should not be visible so it would need a very small lens or a worm like image transmitter to the camera (via Bluetooth) in the pocket.
After Filipe Massa's nearly fatal accident (luckily, he will fully recover from it) a few months ago, a new safety device came to my mind today. It's simple but due to the speed of a F1 car tricky to implement. Like the rollbar of the Mercedes SL it would pop up in front of the driver's helmet and protect from severe injuries. The question is just: "How do you activate it?"