> We’re building a social atlas for the world. And we need your help to do it.

This makes me think of Dopplr. As somebody who was using Gowalla purely for the check-in-to-see-where-I've-been aspect, I think I'm going to end up a Foursquare user before long. I guess you have to do what you have to do in order to stay alive and hopefully end up profitable.