(seems to be a few bugs in the tree-site, rest of the points go into spell warding and blessed recovery)
The plan is this, it is no longer a healing spec (you skip all the healing talents). Instead of healing you put all your efforts into smite and penance for damage and into shields for damage absorption. You will have some damage capability (no idea how much since we don't know how smite looks in Cataclysm) but mostly you will make the healers job that much easier by shielding people (and mana-burning the opposition). Since we focus on (bg) PvP, damage output won't be as important as helping keeping your team alive. It seems like this could be a viable spec (at least in Bgs).
The big advantage of this spec is that you keep some of the healer-attitude, but won't be completely reliable on others to kill. As all healers are now, since they can only heal and hope the other gets bored and leaves them alone, or by some stroke of luck there are actually some competent dpsers in the same BG..., I for one am interested to see if blizzard keeps this or it will be scrapped as well as all the other new features...
Any others interested in non-healing support specs?
*slight edit to the spec (moved divine accuracy to focused power)