The new Tweetdeck intergrates Facebook in two ways:
Firstly it lets you add a new column full of each of your Facebook friends most recent status update (Updates automatically every 1 minute or so). From this new column, you can email updates out to anyone, tweet it out over twitter, view the users online status and if they are online right now, click on their name (or the green online status indicator) to open Facebook chat right within TweetDeck.
Secondly, the new TweetDeck lets you now direct your tweet/update to twitter OR Facebook OR both directly within the tweet window. (Direct messages will not be sent via Facebook even if you have the Facebook checkbox ticked.)
The release is not being pushed out to everyone right now since it is still being tested. But you can get your Pre-Release copy HERE.
Enjoy & Happy Facbook/Twittering…