People were happy that iOS 5 saw integration of Twitter, but were fairly disappointed because of Facebook being left out. Now reports from Tech Crunch suggest that, iOS 6 will indeed have Facebook integrated in its system. Apple and Facebook are still working out on levels of integration as Facebook permissions are quite complex. Twitter was integrated in iOS 5 and is making its way to Max OS X also. Twitter has arranged a session at WWDC 2012 to talk more about it. But Facebook integration will be seen only in iOS for time being.