The continued evolution of the Foursquare game. I love this (mostly because I’m winning and was called both “Juan Valdez” and achieved “Jedi Status”). More importantly, this automatically converts badges into something more meaningful.
Finally, all that wine drinking and sushi eating will pay off — at least for someone else in the form of automatic recommendations.
I’m still holding out hope for my last remaining gaming feature request: Mayorships amongst friends. You basically can’t get mayorships in popular spots in major cities. Too many people are playing. But if you could just battle your social graph, I think that would drive interesting combative social behavior, hearkening back to the early days of Foursquare.