Apple needs to stop trying to build it's own separate social graph for each features (Game Center, Find My Friends, Ping, maybe even Facetime) and give Zuckerberg whatever it takes to integrate with Facebook for friend discovery like everyone else is (i.e. Foursquare, Instagram).
I wish I could see what kinds of games my friends are playing, but the mental stress of thinking through who I know has an iPhone, and manually searching for them just makes it not worthwhile.
Aren't all of Apple's social graphs tied to an iTunes login? At least they are consolidating them across their own network. But, I guess since I can't FaceTime my Game Center friends, that's not very useful...
Also, yes, I don't really care if Apple does social as I wouldn't want to invest in another network either. It seems though they are trying at it and failing, rather than just ignoring it.
I wish I could see what kinds of games my friends are playing, but the mental stress of thinking through who I know has an iPhone, and manually searching for them just makes it not worthwhile.