the author of this app says:
Facebook for iPhone makes it easy to stay connected and share information with friends. Use your iPhone to start a conversation with Facebook Chat, check your friends' latest photos and status updates, look up a phone number, or upload your own mobile photos to Facebook while on the go.
Facebook is only available for users age 13 and over.
What's New in version 3.4
- Added Map View for Places
- Added the ability to Check in to Events that you're attending
- Added the ability to unfriend from the phone
- Improved News Feed
- Improved notifications UI
- Requires iOS 3.0 or later