erm, you want to play/run wow on linux? or the emulator?
if you want to run wow on linux i would take wine (
or cedega (
) it's not free, but if you use a linux with "rpm" packaging system, go to google and write: ext:rpm cedega-5.0.1 or somethink like this.
if you want to run a emulator you could try a windows one and run it on wine (e.g.)
if you're looking for a native one...i'm not sure there is one.
plx! i'm perplex!