I just got one of the new GoProHDs. $100 more than the original GoPro, comes with a rechargable Lithium battery pack (works in cold weather without paying $10 for 4 Lithium AAAs), uses up to a 32GB card (got an 8GB for mine so far, 2+ hour record time using the HD settings), 720P (30FPS or 60FPS), 960P, or 1080P Hi Def recording.
Has all the mount options and toughness of the original.
Weather still sucks here so I haven't had a chance to try it out yet, but the videos I'm seeing on the dirt bike forum that people are posting are unreal. Full screen, crystal clear, totally different than the GoPro Wide vids.
Worth looking into.