A lot of new lock changes are being whispered about in the far corners of taverns and back alleyways.
Go check out the front page news of The Warlock's Den for upcoming patch 3.3.3 items and a few relevant blue posts.
Blizzard is starting to flesh out the Cataclysm changes for casters. Plus they are starting to release more information about Soul Shards. (It is not much but ... they are thinking about it.)