Only played WotLK for 3 hours, but am planning on replacing the Pally in my 1P4S team with him. We'll see how that works.

With this in mind, I am speccing Unholy atm as there is a debuff that increases magic damage on targets, so that should be good for the shamen (unless my understanding of game mechanics is not just poor but horrendous). I think the AE tanking will be on par with Pallies, but what I am concerned about is the tanking powah... are they going to be able to take a hit as well as pallies? We'll see!