These are generally considered pretty solid.
Amazon.com: Garmin Virb Action Camera (Discontinued by Manufacturer): GPS & Navigation
I picked one up and will give it a spin later in the week. If it can focus fast enough for MTB and whatnot, you'll all be privy to a whole bunch of boring cycling videos!
Read the thread title and thought "do people really still buy dedicated GPS units for their cars?" and then realized this was yet another cycling thread.