Found this little gem out, I have seen some videos in the past when people want to impress others with the sheer number of monsters they can AoE.
I even tried it a few times, but they do not drop anything!!!....unless...
You are on 1 of these 2 quest's, either Aldor or Scryer.
Karabor Training Grounds
Thottbot World of Warcraft: Sunfury Glaive
You kill these....
Demon Hunter Supplicant's..
Thottbot World of Warcraft: Creature: Demon Hunter Supplicant
They have incredibly low health, and hit weak, easy to round up lots of them, none of them are casters either, makes the AoE that much better!
They drop loads of Gold, Netherweave,Sunfury Signets, and Arcane tomes SO LONG AS YOU'RE ON THE QUEST. So just dont ever turn in the quest and keep farming.
In 1 good pull, I can net 7-10g, 40-60 Netherweave cloth, 20ish Sunfury signet's, 1 Arcane tome, and usually 2-3 random world Greens.
Have fun, just do not turn in the Quest for those Sunfury Glaives, and you're made in the shade.
Edit: Added a very rough video of myself doing it, wasnt a full pull of the platform, but was a good chunk :P
[ame]http://www.youtube.com/watch?v=9hobWf7Ueok[/ame]