The latest offering from Contour is ContourGPS. It has the same high resolution recording but added GPS into it. It can track your route and using their software, it can integrate Google Maps into it.
Here is a physical comparison between the ContourHD and ContourGPS.
Some excerpt from their website which I think explains the Contour GPS function.
Add an entire new layer to your storytelling. The built-in GPS receiver tracks your location multiple times per second with pinpoint accuracy so you are able to capture your location, speed, and elevation while recording in beautiful hands free HD.
Make your video come to life with the Contour software. Watch your run via interactive map and video player that allows you to see and control the action. Challenge and compare stats with your friends to see who measures up.
or watch this video. It is quite awesome with the interactive Google Maps.