I have been pestering at&t customer service about it as frequently as I can. Maybe once a week.
The chat guys are really nice but they admit they dont know anything about the update. They admit it has been released over 3 months ago (by samsung to at&t) and that they have to sanction it first. They also say "i dont konw, might be never".
I got a chat guy for AT&T to admit that 4.4.2 for S4 was released 2/26/2014
So if it was this recently, note 3's update is probably coming soon.