http://www.gpsgate.com/Index.aspx
Not sure if any one has noticed.....
Quote:
GpsGate.com - Online position sharing As a member of GpsGate.com, you can see the locations of your friends and family (not to mention yourself!) on a map moving in real-time.
You can also route your position over the GpsGate.com server and pick it up with GpsGate on your Windows laptop or Windows Mobile Pocket PC.
Would you like your buddies to follow your adventures during a boat trip in real time using Google Earth? It's easy and fun! Just register an account, install GpsGate to your Windows laptop or Windows Mobile Pocket PC and start sharing your GPS location today!
To send your position you must have GpsGate installed
Plus from talking to them I think they have some cool mods coming up too
Terran