EDIT: Apparently it's working as intended. Still, I bet there's lots of people (like me) who had no idea about this
Just noticed this today.
While you are on the attacking side in the battle for TB and win, you will get 1800 bonus honor. Yes, 1800 and you can do it every ~ 4 hours ( shift control of the battleground every battle )
Screenshot:
http://img835.imageshack.us/img835/8657/editedr.jpg