I'm using this build right now for raiding / pvp
http://www.wowhead.com/talent/?bxgGsAZfVthc
I took BR because I do a -lot- of main healing, so if i get crit high, it's a bit of extra healing on me *shrugs*. I took imp inner fire to cut down the damage I do take while pvp healing, and martyrdom / imp PWS are just required for pvp. Plus spell warding should be an obvious choice for pvp healers.
I took silent resolve and imp healing for raiding, as gheal is my spell of choice during raiding. 386 mana 2400+ gheal crits are very very nice to get. Also, I do a lot of dispelling, both in pve and pvp, so mental agility is super good for that.