Checkit out kinetic.
Shaman isnt bad here in the 20 bracket, but its not the best, IMO Hpal>shaman=priest>rdruid
With what everyone is saying about the queues, the alliance ones are hardly ever over 10 minutes these days, horde is near instant to about 5 min.
IF you are rolling on AP, i would almost reccomend anything but human, because of the fact that it is damn-near impossible to get AGM on AP.
alll that being said, all the gear for healers, besides a few pieces here and there are horde-only. Even cloth gear is better for horde than alliance. Alliance has a great shield, an eyepatch, a staff that is only usefull to some warriors that us it as BiS, and a ring... horde has so much more than that its not even funny, everyone just complains that eyepatch is the reason of the faction imbalance (which actually has slowly been balancing itself out.) I would love to see a good priest here on AP, we dont get too many and most of them are too lazy to gear BiS!!
Hope this all helped!