The Apple TV has updated to 4.4.2, barely a week after releasing (then pulling and releasing again) the 4.4.1 update. That update contained a number of bug fixes, and we're assuming this one will have the same.
However, TUAW editor Victor Agreda reported that updating his Apple TV to 4.4.2 has lost all of his information and is setting up the device as if it was brand new, then showed it was still on 4.4 instead of 4.4.2 and required another "update" round before the 4.4.2 update stuck, so you might want to make this update with a bit of caution.
We'll update the post with more details as soon as they're available.
The update is available now through the Apple TV's software update.