Many manuals of installing and using World of Warcraft (or simply WoW) in Linux using Wine (Windows emulation) are outdated and provide lots of complex instructions for old Wine version. The truth is very simple:
SET gxApi "OpenGL"
SET SoundOutputSystem "1"
SET SoundBufferSize "100"
That is it! You can now simple run 'wine WoW.exe' and play the game. Updates also work perfectly. The speed is a bit faster then in the other operating systems and (just like in MacOs X) you can have all your software opened on one virtual desktop, WoW on another and switch between them instantly.