In reply to vark:
another vote for the gopro here for 2 reasons... quality of footage and the unbelieveable mounting options that the waterproof case offers
i've used mine for mtb (helmet, bars, seatpost)
drytooling (handheld, on the axe looking down, helmet mounted)
skiing / snowbaording (helmet, chest / back strap and a custom mount)
rock / indoor climbing (helmet / head strap)
via ferrata (headband mount)
timelapse in the office (just for a laugh)
yes, it's expensive, but incredibly versitle and as a new version has been released the HD has plummeted in price
i find myself looking for more uses for it, it affects how you approach things... "ooh i could put the gopro there..."
<ok i've finished gushing now, move along, nothing to see>