You may not be a fan of Google+, but Facebook certainly is! Now Facebook's iOS app also has the improved status sharing options that the web version borrowed from Google's new social service. This means you can choose who to share your status updates with.
You can also tag people and places from the iOS app. Alongside are a range of bug fixes and small improvements - most noticeable are faster notifications, better chat and stability. As long as the desktop browser version of Facebook works better, the iOS app will always feel like a work in progress to me, but even so, it now seems to be catching up.