Well, we went in to attempt an Undying 10 man Naxx run last night... and We lost one person on Thaddius by crossing positive and neutral charges :(. The run was going very smooth until then, and we ended up disheveled and lacking in focus afterwards. People stepped away from their A-game and swapped it out with their I don't care game. Understandable considering there's nothing in 10 man content that we want.. we just were interested in the achievement.
So no Undying for me or my girlfriend this week, but we'll try again next week and see how that goes.