I use a cheapo HD one from Maplin:
HERE
It is identical to the VEHO, and a million other clones available on ebay. It also fits the VEHO ‘extreme sports’ waterproof enclosure kit, wich comes with a multitude of different mounts.
One tip though, ditch the free MicroSD card it comes with, and replace it with a decent high speed class 4 card for smoother recording.
For £20 – £50, depending on where you shop, it is cheap enough to be almost disposable, so you dont really worry too much about breaking / losing it.
One handy function is the sound activated recording – meaning the cam can be used as a security cam if needed. It sits there on standby, until it hears a noise, and then it begins recording. I’ve used it to good effect catching an @sshole colleague tampering with my bike in the company bike shed…