I've been looking at this kind of camera and really like the video, however, I have found my I-Kam Xtreme sunglasses to be just as good and more versatile (think skiing, hunting, etc...) Short drag video, yeah, a little more vibration, but for the price ($160) I didn't think it was bad -
http://www.youtube.com/watch?v=wasw45HkU9s
Get from predator outdoor products.
What advantages, compared to the video I posted, do you see with the gopro that is necessary/useful?