TechCrunch and a few other sites are posting that the Facebook iPad app has finally arrived on the App Store. I don't quite see it on the store yet, but the news has apparently dropped according to a schedule run by Facebook itself, so the app should follow soon. The app looks about like you'd expect a Facebook iPad app to look, with a sidebar available in landscape mode, and a dropdown menu to browse the various sections in portrait mode.
One of the biggest features of the new app is integration with other apps -- apparently the app can send you directly to other apps on your iPad when you browse to them from a friend's status or news post. For example, if you read about a Words with Friends
