Shaman PvP

[arnez]

for arenas 2s and 3s Resto shaman all the way
For 2s and 3s enh are ok
ele is only for 3s low defences/CC for 2s

[Drekthhar]

resto shammy prolly the best healer in 3s for 4.3.4. patch

[zombicore]

Generally speaking, a decently experienced and geared resto shaman can turn the tide on a BG.
Riptide + two Greater Healing Waves can patch someone up back to 100% health in no time if you're in a hurry.
And their regular Healing Wave is one of the most mana efficient heals in the game, and like GHW, have the bonus of being cast EXTREMELY fast after shooting up a riptide (more like riptight, am I right).

I'm not much of an arena guy, but they can be really freaking annoying, they're only topped by holy paladins who I think are broken as hell, especially when paired with a DK.