A few days back I got my first [epic] random world drop! After a year of running around Azeroth and Outland I didn't think it was possible to get an [epic] via a random drop. I'd seen it happen once with my friend Analar, and of course there are the epic boss drops, but those don't count.
This item dropped off of a hyena in Tanaris, just your basic run of the mill mob. Sadly I can't use it, so I'll probably auction it or something.