Given other discussions going on around here, this could be a timely project:

http://www.kickstarter.com/projects/rideye/ridey...

What makes this interesting is that it has claimed 12 hour battery life, and records a 1 hour continuous loop which is saved at the press of a button or if the unit detects a crash.

Little heavy at 300g, but it's built to survive a crash and the price is good.

Any backers?