According to LOTS of ppl you cant get up to exalted by killing brusiers. This is known as a """BUG""" or as something Blizzard forgot to do after Cataclysm.
Everything is unknown.
You can check
http://eu.battle.net/wow/en/forum/to...9608237?page=1 . This guy is making a really awesome job keeping this alive so blizzard changes it for all the INSANE PPL who loves getting everything in game.
Yes, there is a mob respawning every 24/48hours, it gives 5 rep and would take 10 years to get from 11999/12000 honored to 999/1000 exalted.
=)