I use a program called GOOPS which tracks your progress, speed, distance etc, and overlays that information on Google Earth. Looks cool -
Here's the track of me going into town.
And the GPS Receive is so accurate, I never thought it would be this good. You can even see which side of the street you were travelling on.
It doesn't tell you which way to go in the way a Sat Nav would, but it looks pretty cool.
Panda

