Here is one decklist I have found at the recently concluded Starcitygames Open Tournament at Indianapolis which I considered to be the most decent build of a Red Green or Gruul aggro deck. The deck was piloted by Jimmy Brandlein and he finished in 28th place in the tournament. Below is the decklist.

Creatures (28)
4 Growth-Chamber Guardian
4 Gruul Spellbreaker
4 Jadelight Ranger
4 Merfolk Branchwalker
4 Rekindling Phoenix
4 Skarrgan Hellkite
4 Zhur-Taa Goblin

Spells (8)
4 Lightning Strike
4 Shock

Lands (24)
9 Forest
7 Mountain
4 Rootbound Crag
4 Stomping Ground

Sideboard (15)
1 Carnage Tyrant
4 Wildgrowth Walker
4 Cindervines
2 Vivien Reid
4 Lava Coil