there was a dude who made a helmet gimbal and it turned out awesome, just being up there it'd swing around corners etc and catch some great shots. search around you might find it.
I borrowed a gopro a few times offroad and stuff, but never could take the time t sit down and review all that footage for just me to watch? like who wants to watch you riding. uness you're trying to edit down to show off some silly stuff. I always wanted to video just doing dumb urbn dirtbike shit like launching off stair sets or median barriers and riding the underground on my commutes home, but never did it.