Use the Map is an application created on the API of Facebook and Google Earth, it allows you to see the friends you have there displayed on a map. Once you enter the application you can send the invitation to the friends you select to join.
It is still half raw, but it looks interesting to see how our contacts are reflected on a map. The location, in terms of a precise address, seems to me to do Chilazo Well, friends I know where they reside appear on the other side of the city. We do not rule out that over time it will be integrated into what Google Latitude.
Either way, it is another application that adds to the I showed you before, in which you can see travel histories or proposals. Another alternative is Friends on Fire, which integrates with the Yahoo Maps API according to what Guillermo Klew tells us.