That fight is hilariously fun on 10man when you're stacked with CCs/interrupts/dispels. Not really hard at all but it's a change of pace from the first two bosses. Got resto shaman, holy pallie, DK, warrior, mage, and hunter. After the healers go down it's pretty much over though.
I do like the fact that it's different from most other fights though. Heroic version should be beastly.