GarrukWildspeaker went and beat me to the punch, but he's spot on regarding the way the build should be refocused on the creatures. Selesnya has some MAJOR advantage in that it consistently produces 3/3 creatures for the same cost other colors will pay to get a 2/1 or 2/2. Additionally, Advent of the Wurm is pretty good I hear.
If you'd like to take a gander, here's the list my GF ran at Theros Gameday and did pretty well with (considering she's still learning to play in competitive environments beyond casual and EDH). http://deckbox.org/sets/428181
One other point of personal preference regarding Voice of Resurgence. It's a great card that's seeing play across a few formats, it's certainly a pricey one too. But that aside, I personally don't see the sense of it MB in an aggro build. If it's your objective to put a ton of pressure on the opponent early, a 3/3 for two is much better than a 2/2 for two, regardless of its ability to drop the elemental token when it dies. I could see having them in the SB for control match-ups and such when you know the game is going to slow down, but in an aggro shell, I would rather have Fleecemane Lion, Call of the Conclave, Selesnya Charm or Precinct Captain in my hand long before I would want Voice. Maybe it's the fact I've unloaded all of mine already, but I remember watching it just flounder at my LGS for DGM Gameday...