Just be aware that helmet mounted cameras "can" result in a ticket and walking home. See the legal forum for more, but basically it renders your helmet uncertified and you can't ride with it. Yes many many riders still mount their cameras there and the chance of getting nailed is pretty small just need to be aware.
Not sure if a contour can be "hardwired" You can get a hard wire waterproof connector for a GoPro, (see group buys sub forum). Not cheap option though. Not sure you would want to run it to your helmet.