This is the one I've got on the way fairly soon. ~$120 bucks from amazon + $30 for a suction cup mount.

I'll be posting video with it asap when I get it, I'll let you know how it is.

Edit:

Whatever you get, make sure it has a wide angle lens. I've tried a couple other cameras I've borrowed from people that didn't have them and it makes the resulting footage unusuable.