We heard it was out via Twitter, but wasn't showing up in the App Store listing. The trick is to delete the old app, then reinstall and the new version automatically installs.
It's really sweet and, as far as we can tell, has all the functionality of the online/PC browser version - and it's REAL TIME!
We can see that 90% of our FB use is going to be via the new iPhone app.
-- Posted using the Robots Dreams iPhone.