I don't get Foursquare from a users' perspective, but the possibilities of location-based marketing make it a no-brainer investment from a business standpoint.

I don't get Foursquare from a users' perspective, but the possibilities of location-based marketing make it a no-brainer investment from a business standpoint. Their situation is the inverse of Twitter searching for a business model, if that makes sense. Foursquare just needs to figure out how to appeal to "normals" and they will be golden.