I've done some more research on this.
This unit sounds like it has some merits. Too bad the guys in Norway and didn't post any contact information.
http://personal.dynator.no/tracy/tracy.html
Here's a thread describing it too.
http://www.gpspassion.com/forumsen/t...TOPIC_ID=26282
http://www.gpsdash.com/overview.ppc2.php