So.. I was reading this:

http://www.worldofwarcraft.com/info/underdev/3p3/icecrown-raid.xml

And it says that in the Incecrown citadel you will join many heroes such as: (list of heroes), Muradin Bronzebeard! I thought he was killed by Arthas when he first got Frostmourne? Yet.. now he's back? He must have gotten a battle rez.

But seriously, how's he still alive?