Here's the skinny... using your mobile phone or PDA, along with your GPS receiver, you can record and view your movements in detail on Google Earth or Google Maps. You can even use the free service for live tracking using Google Earth or Google Maps. What's needed? Download of the required 3dtracking application, as well as use of the website, is completely free (and there are no future plans to charge for this either. Ever according to (Roydon Michael, Managing Director - 3dtracking Ltd). From Roydon... "The web server also retains all the data you’ve ever recorded and submitted, so you can always go back and view your older recorded data at any time". For more info see the FAQ or instructions on the website at http://www.3dtracking.net.