Its fully integrated. Ive got fb chat set up to be online at all times, and it is. You see in your contacts list who is online by a little icon on their display picture, you can start a chat right from contacts list, you get notifications like its an SMS, its really pretty damn great. Of course all your available chat accounts can be set up for this, like google talk etc. Thats one thing the N9 did pretty well. No MSN though, which is a shame.