Regular camcorders aren't ruggedized for action sports. The VIO is a good camera except for high price, inferior resolution, and the damn recorder with cables in your backpack. For most of these cameras you need to take your gloves off to push buttons and often your goggles too to be able to see which button you're pushing. That's why I like the ContourHD - it has one huge slider for on/off. Easy to use with glove on, quick, no checking. HD is much more forgiving with lighting conditions etc plus it just looks so much better than any other video.
But, still, I recommend to everyone... rent them before you buy and try it out: VIO - Adventure Eye, ContourHD emotioncam.com