Gmap Pedometer

This is great. Period.

If you're interested in running, cycling, walking etc, and want to know how far you've been (or how many calories you've burnt etc), you can use this to map out your route.
If you're a techie loser like myself, this can be exported as .gpx to be uploaded to your gps unit so you can have a route to follow.
Everyone else might just like to see how far it is to the shops....