From the official app page:
What’s New in Version 3.3.1
- Groups: share photos and posts with small groups of friends
- Deals: discover great deals around you
- Places: tag more friends after you check in, add photos
- Various bug fixes
You can get the updated app from the link below or by checking for updates in iTunes on your iOS device.
Download Facebook for iOS v3.3.1 [iTunes Link]
UPDATE 1: Looks like Facebook has just rolled out v3.3.1 of Facebook for iPhone app.
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