Well I hopped on my 70 and respecced Holy (again) this time with the intent of doing some BGs and eventually doing some arena. This was my first go at arena after S3 kicked in to play and after a few losses and one win my 2v2 buddy and I decided we both needed to seriously upgrade our gear for arena before we attempt to do it again.
So I've been doing BGs trying to get the PvP epics with S1 gear and my Rogue buddy is doing that too. I've found that I can tank players much better as Holy as I could as Prot just by healing through the damage. I am literally laughing when I've got 3 guys pounding on me and I'm keeping myself alive long enough for the calvary to come and wipe them out, me still standing after the ensuing battle and eating my manna biscuit.
I'm also almost always the top BG healer across both factions, and on an unlucky BG I'm second or third. I'm also seeing how having at least one healer around dedicated to healing is like having a nigh-unstoppable army and I have a lot of fun marching in with 4 dps going up against 7 enemies and winning because I am healing them all. An enemy which refuses to die is an enemy that cannot be beaten.
Anyways, just thought I'd share what I was up to. Don't worry about the respec, my heart is still with tanking, but it just doesn't work in PvP nearly as well as Holy. (You can check out my healing gear in my profile link. Obviously more PvE healing gear, but like I said I'm starting to work on getting my PvP healing gear.)