on the official forums the class role forums for Healers, Tanks and Dps are very productive because it all allows all classes capable of filling a certain role discuss differences and tips and techniques with each other.
I wish you would consider Class Role forums in addition to the Class forums.
We've discussed this a few times, but I think the end result has been not enough interest so far. We can take another look and see how things stand now that MoP is out, though.