We been trying with steady cam mounts etc. for years but this seems to be the one that actually works

To sum it for someone who hasn't heard of one it is basically a gyro stabilizer for your camera.
I got a cheap one on ebay to test it out, improvised a C-handle and did a few tests.
Here is a video I did to show how it works:
https://vimeo.com/82883641
Here is a test on the mountain bike:
https://vimeo.com/83388186
It is only a 2 axis so does not fix yaw shake. there is a lot of shake on a mountain bike but I think it should be ok on a snowboard. You can see that the pitch and roll is locked solid

I want to gets bigger 3-axis one in the future.
Some other videos so you get the idea:
http://www.youtube.com/watch?v=Gat7z9IsoQM
https://vimeo.com/64499433
http://www.youtube.com/watch?v=gY2811NVoNM