Here are some screenshots we received about possible Facebook integration into iOS 5.
Such a feature has not been announced, and we were unable to confirm the screens. Apple has provided Twitter integration into iOS 5 and included a framework to allow them to extend it to account integrations. So, Facebook integration as a system level feature would not be a stretch. These screens closely resemble those of Twitter's integration and could easily be mocked up:
Ultimately, Apple's decision to integrate Facebook into iOS seems to rest negotiations between the two companies. Apple had closely integrated Facebook into their Ping social service, but the feature was pulled at the last second due to "onerous terms" that Apple could not agree to at the time. Since then, Facebook may be feeling more pressure with the early growth of Google's own social network, Google Plus.
Article Link: Screenshots of Facebook Integration into iOS 5?