I saw this posted on the official forums a while back and meant to post it earlier, but haven't gotten around to it. Well, here it is.

This guy obviously spent a LOT of time coming up with this online healing calculator which he calls Healbot. This thing is will take into account talents, gear, intelligence and whatever other variables you can come up with and graph out how your heals will be affected. He's mapped out heals for Shaman, Paladin, Druids and Priests. A truly awesome tool.

My hat goes off to you sir.