For those wanting an onboard camera for cheap, I just picked up a pair of contourHD's off amazon for 137 shipped each. There's a new entry level model coming out from those guys so I think retailers are trying to unload stock of the old model. Differences between the new and old version: old has a narrower viewing angle and lesser quality lens (still shoots damn good video), new has a seriously wide angle lens (lots of fisheye); old has a removable battery, new one is built in; new one might be a bit smaller/lighter but I'd have to look into it. Battery life, memory capacity, mounting options, resolution and frame rate settings are all the same between the two.
FWIW I've been shooting video with contourHD's for two years now and love the little things. Mounting options are a little pickier than the gopro unless you buy some extra mounts but they're much lower profile.