I know this has been mentionned in the blood solo thread, but i thought it'd be worth a mention anyway.
Aelobin, level 80 blood dk has downed the lich king. i believe hit/exp cap then haste and mastery were the stats of choice.
No flaming on how the class isn't balanced around 80 or 85 and that we're in an expansion transition patch, this is still pretty amazing.
GZ on the world first dude!