to make wine use pulses oss for wow.. do this

open up the console
Applications->Accessories->Terminal

type 'winecfg'

when it opens goto sound, or audio tab whatever its called

and select OSS checkbox

then OK


this will make wine use oss for sound, to make it use pulseaudios oss

change your wow shortcut to add 'padsp' to the front of the command line, like heres mine:
padsp env WINEPREFIX="/home/intangir/.wine" wine "Z:\\media\\windowsgames\\Games\\WoW\\wow.exe"

the rest of the setup things were here:
http://www.wowwiki.com/Wine