When the Cataclysm talent trees were up, I looked at the Enhancement tree and studied it for along time... I figured, finally we're PvP viable when I saw:
Ancestral Swiftness
Increases movement speed by 5/10/15%. This does not stack with other movement speed increasing effects.
Lava Lash
You charge your off-hand weapon with lava, instantly dealing 150% off-hand Weapon damage. Damage is increased by 40% if your off-hand weapon is enchanted with Flametongue. 5 yard range, 10 second cooldown.
Stormstrike
Instantly attack with both weapons. In addition, the next 2 sources of Nature damage dealt to the target from the Shaman are increased by 20%. 5 yard range. 8 second cooldown. Lasts 12 sec.
Even though it might not seem like much... it's a huge leap. 15% increased movement speed + an extra 5 yard range on our most used abilties... <3