The guys over at gspot posted an interview with World of Warcraft composer Jason Hayes, check it out...
GameSpot AU: You have a long-standing relationship creating music for Blizzard. How did that come about?
Jason Hayes: I was involved working with Sierra Online. I went over to a game developer's conference and wandered over to the Blizzard booth and made someone put on headphones and listen to a portable compact disc player with some of my music on it. I think they were just being nice actually, to entertain me. Eventually I got in touch with the audio director and we set up a meeting. Eventually I was hired.
Read the Rest...
http://www.gamespot.com/news/6172231.html