Two cheers!  Now I'm on Black Morass as well.  (After that I'll make the third cheer.)

Thanks to Jyggle for running CoT - Durnholde when he (he, she, lord I'm confused) already had it done.  And thank to him, Mouzone and Spoiled for sticking around to run the instance AGAIN 'cuz the escort quest was borked for two of us in the group.  Lastly, of course, thanks to Darkeyone, my uncle, who jumped on the bandwagon to be our fifth.  Woot!

And, a word to the wise, be careful to make sure everyone is on the same leg of the escort quest before starting it.  This is a bit obnoxious, as all escort quests can be if you're not careful.  After the quest Taretha's Diverson, everyone should turn that quest in to Thrall.  Just to be on the safe side, do not accept the next quest from him until everyone has turned in Taretha's Diversion.   After that, everyone should accept the new quest from Thrall, Escape from Durnholde, but DO NOT TALK TO HIM AGAIN yet.  After everyone has accepted this quest, one person in the party should talk with him again and it will start this escort quest.

One thing we found out is that the adds which appear in successive waves of three when you start with the last boss are fearable.  (They start as human and turn into dragons when the fight begins.)  Finding that out on our second attempt at the quest made life SO much easier.  (We had two locks in the group.)