Seen most of kara. Oddly, all the begining bosses and the end bosses but none in the middle. Been to gruul's a couple of times but haven't managed to down him yet.
I started playing about 6 months before TBC came out so I have not seen any of the orignal endgame stuff. I'm sure I will eventually as my guild does run them every so often.
Edited, Oct 11th 2007 9:34am by jwhx