In this episode Chris, Gav and Kevin talk about stuff that Blizzard SWORE THEY WOULD TOTALLY ADD GUYS, but, you know, development cycles and all that jazz. Also, they ramble. A lot.
Links:
Wow Developer Q&A
http://www.youtube.com/watch?v=kpLwCPBFffk&t=3371s
The Coast to Coast Expanded Universe 