Just got my go pro HD today!!!!!!!!!!!!!!

[Johny_Ringo]

Heres the video, gotta get the camera adjusted a little better be not to bad for a rip around the block. Thinkin I may want the handlebar mount.

http://www.youtube.com/watch?v=4fNom6sJ3z4

[Krandall]

and Not sure you'll want the handle bar mount.. the idle of the quad makes a really sharp vibration and screws with the video... you're call, but that's my past experience.

[Headrope]

I agree. So far I've found the handlebar mount to be very handy but for other uses than the quad. You'll find all sorts of cool ways to use the camera once you start getting used to it though. Extra mounts never hurt.
As far as setting up the camera: It will take you a couple of rides to sort out the angle. Keep in mind that when you're riding on your quad you'll be leaning forward, so you'll want the camera to look as if aimed high when attached to your helmet while you are sitting up straight.
Have fun.