I've had my GoPro Hero2 for a couple weeks now. I've got a RAM mount to mount the camera to my bike, and a helmet mount to mount the camera to, well, my helmet.
I haven't had a chance to test it out other than filming a recent commute to the office, which you can see here: http://www.youtube.com/watch?v=gPDHCdiHkMo&feature=plcp
I'm really looking forward to ski season, where I'll be able to easily video my son's skiing with the camera mounted on our ski helmets.
I've had no problems operating the camera while it's attached to my helmet. So far, I haven't seen a need for the Wi-Fi remote control. Once you learn the sequence of pushing buttons, you can do it with the camera out of sight.
Experience IS NOT the best teacher! Someone else's experience is the best teacher.