Get one if these: Makes recording a breeze if you've got a helmet mounted cam. It turns the cam on and off remotely which is handy as the gopro hasn't a screen, toggle the menu and modes etc... A good bit of kit.
Yup, got mine here: NEW GENUINE GOPRO WI-FI BACPAC & WI-FI REMOTE COMBO KIT | eBay Delivered in 2 days, cheapest on the net.
Yup, they do... Mines the gopro hd, not hd2.. Works great. You don't get smart done connection for streaming, but I'm not bothered about that anyway.