Thanks - it feels like a missed opportunity within Apple that I'm not sure they're going to get right. I had another friend message this morning saying there is probably a better solution here. Will check out Skillz.
I recently built a new word game (SparkWord) on top of GameKit and Game Center. Apple really needs to up its game for indie mobile devs because right now it's not close to where it needs to be for support.
Agreed - I'm interested in watching how Google+ plays out in the long run, but I'm not sure it will end up being the Facebook killer it's being positioned as today.