I was reading the forums earlier and I saw some threads about earthquakes in Azeroth. I thought it was just people mistaking large animals or something walking near them as earthquakes, but just moments ago I was fishing off the coast of Borean Tundra and I saw my screen shake two times within one hour.
Is it possible that this could be a small hint that cataclysm is coming? I know it isn't being released for quite a while, but in the trailer for Cataclysm it says something like the cataclysm is happening while the war wages on the Lich King.