Mologogo - The GPS phone tracking social network

Mologogo is a free service that will track you and your friends using GPS-enabled mobile phones.
Use Mologogo to:
See where you are and where you've been
Find friends who are close by and chat with them
Search for local points of interest
Keep track of kids, employees, and vehicles
Check real-time local traffic and weather
Share your location info on blogs or web pages
Post your location to Twitter