Yahoo fire eagle, Fire Eagle is a site that stores information about your location. With your permission, other services and devices can either update that information or access it. By helping applications respond to your location, Fire Eagle is designed to make the world around you more interesting! Use your location to power friend-finders, games, local information services, blog badges and stuff like that... [ from fire eagle ;) ]

Check it out, you may need a yahoo id for using it.