Jason Hayes worked at Blizzard in wc3, original wow and tbc times. He made most of the wc3 and original wow's outdoor tunes like elwynn forest, burning steppes, stormwind themes. He's now working at Valve and has made the new Dota 2 soundtrack. Blizzard should definitely hire this fella back! Just listen to Dota 2 soundtrack, this fella knows how to make music for fantasy games. This is only my opinion, but what do you people think, does this fella still knows how to make music and should blizzard hire him back to make music for wow again?
Edit. As of June 2012 he's back at Blizzard. Source: http://www.musicbyjason.com/forum/in...p?topic=1091.0
Here is some new tracks he had made for patch 5.1
http://www.youtube.com/watch?v=kV_HgkDs33o - Darkmoon Faire
http://www.youtube.com/watch?v=TVkopBZCtc8 - For the Alliance
http://www.youtube.com/watch?v=856CQ5vu1bo - Jaina Homeland
http://www.youtube.com/watch?v=7ThnpGLgpoA - Alliance Battle march
http://www.youtube.com/watch?v=boSGPUGpJ94 - Garrosh
All tracks are composed by Jason Hayes except "For the Alliance" which is done by Hayes and Brower