iPad Gaming: Game center friends

I know, game center is not an new feature on iOS, but it's a fun thing to discuss for me! Well, if you have friends holding iOS devices with game center the fun begins. If you are playing game center supported games you can: compare score, visit their farm(eg. dragonvale) and it is just a more exciting experience! I can't wait for mountain lion since it is going to support game center and I would expect more games that are from iOS!