Facebook for iOS gets updated and brings enhanced sharing, status icons
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Another added feature is the enhanced ability to easily change who can see what you have shared. Not only are you limited to just “you” or your “friends” or “public.” This feature provides a bit more granular control to the user in terms of privacy. That is not such a bad thing nowadays.
Finally, you can incorporate icons, or emoticons that are linked to how you are feeling when you post a status update. There are numerous categories too. Right now, the new icons are available only in English.
source: Facebook (iTunes)
Things that are NOT allowed: