IE browser affected; firefox a-ok:
link (http://forums.worldofwarcraft.com/thread.aspx?fn=wow-realm-proudmoore&t=56099&p=1&tmp=1#post56099)
Apparently there's an ad served on allakhazam pages, that has an embedded trojan that steals your WoW login.
I'm reasonably sure all they could steal is your login ID, and that's if you select "remember ID". I'd be interested to know how they'd steal your password since it isn't stored.
some kind of key logging maybe? idunno, i have no idea how this stuff works.
Mem-resident key logger. It installs an exe named "mume.exe (?)" or "fucksnow.exe", probably related to the relatively well-known Black Snow Interactive goldseller.