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.

Get it here: http://itunes.apple.com/app/facebook/id284882215?mt=8&at=1l3vawp&at=1l3vawp