So in looking for a spec for Cataclysm (and I know things can/will change) it looks like Disc has been redesigned to use Greater Heal.
I was thinking about using a 32/9/0 build for Shielding/Tank healing.
http://www.wowtal.com/#k=veypGTKj.9q4.priest
What are you opinions about the viability (so far) of this build.