After more than a few false starts, I finally found a PuG group that managed not to A) blow everyone off the platform or B) stand in Defile:
I'm really quite happy about that. It's not the easiest raid to PuG when there are so many abilities that will kill you - and the rest of your raid - no matter how much health you have.
Plus, it was the last Achievement I had in ICC... and I'm pretty sure I'll be able to solo or at least only need a small group to do most of the rest of the WotLK raid Achievements. Woot! :)