So you logged in on Tuesday and all your talent points were gone. (Let's hope you noticed this fact before you went out to attack someone or something.) If you're looking at the new Elemental tree and wondering what talents to pick, here's a little help for you from someone who's been speccing and respeccing almost pure Elemental on the beta servers for several months now. (That would be me.)
The first thing you should do is go read what our resident shaman expert, Matt Rossi, says about the overall changes to our class in Echoes of Doom, just to make sure you still want to stay Elemental (Part 1 and Part 2). For my part, I leveled to 70 as Elemental and saw no reason to switch as I worked my way up the new Wrath talent tree. Since we've already been over the new spells, the point of this post is to simply recommend a build for you. So let's get a-buildin'!
Both the PvE and the PvP specs start the same way. Take all 10 talents on the first row of the Elemental tree (Convection and Concussion) and put 5 points in Improved Healing Wave on the Resto tree. This is probably no different than your spec before Echoes of Doom.
PvE and PvP are the same here too. Max out both Call of Flame and Elemental Warding, which will improve both your DPS and your ability to survive. (That's right, elemental shamans are all about FIRE now.) Raiding shamans, on this tier you should also put 3 points into Ancestral Healing so that when you off-heal, your targets can reap this potential armor-increasing benefit.
On the third level, both PvE and PvP should take Elemental Focus and all 5 points in Elemental Fury, which are both talents you probably had before the patch. PvE can take all 5 points in Reverberation, but PvP should save 3 of these points for later.
Both play styles should max out the points in this tier for Eye of the Storm (familiar talent) and the new Improved Fire Nova Totem. Now some of you will say that PvE shouldn't be using Fire Nova totem and I'll partially agree with you. No, you shouldn't be using it in raids or instances. However, you can use it carefully in PvE and questing (which I've done) and it can be extremely useful because of its slowing effect if you get mobbed.