Every one of us has been sitting at our computers with bated breath, eagerly waiting to see the new spells and abilities coming to our favorite class in Cataclysm. The truth, however, is that we've already seen many of these before. Some of these class previews started in Icecrown Citadel, not on the forums.
What are we talking about? In Icecrown Citadel, there's a mob in the Upper Spire region of the raid zone called Val'kyr Heralds. They summon other mobs called Severed Essences, which are clones of members of your raid. They don't use all of your exact spells, but they fit each class. With the exception of one (Focused Attacks), each of the unique spells Severed Essences possess have ended up being a new spell for their class in Cataclysm.