Yeah, it's Richard Cheese, he does "metal" songs and sings em normally, it's funny. He did Dawn of the Dead, singing Get down with the sickness.
I love the zombie thing, it's so much fun...people in /2 are PISSED though. Being a holy priest, it's fun cause i cure everyone and just run about, gather groups to kill off the infestation in Shattrath. In Gul'Dan the outbreak is heavy in Shattrath.