This all happened on Tuesday, March 18th. By Saturday, March 22nd, I had the two shiny pieces of loot that were coming to me: Glory of the Defender and Onslaught Handguards. Specialist Game Master Skelend had sent me the items, along with a form letter apologizing for the issues we experienced in game. I was quite happy to see this resolved. I was even more pleased that it was resolved quickly and did not take a few weeks; as many people, both those of you who left comments and friends of mine that I talked to, said it would.
So what are we doing to make sure this never happens again? Well for one thing, all the melee is hitting the boss now with a ranged weapon after the tank gets a couple hits in. That's pretty much all we can do to assure this problem doesn't pop up again for us. Despite a few enquires I've made, there is no word from Blizzard if they've fixed this. I suspect that one day it'll just be hotfixed without much fanfare.
All in all, not a terrible experience when something went wrong. Quick and quality support from Blizzard.