I don't know how accurate this is, but Wikipedia has a listing of the Episode titles of Brotherhood up to ep. 5:http://en.wikipedia.org/wiki/List_of_Fullmetal_Alchemist_episodes#Fullmetal_Alchemist:_Brotherhood
So, it looks like our episode break down is this:
5. Introduction of Scar
So meaning if they intend to follow the manga, then we've got the Resembool, 3rd laboratory, (possible Al angst arc) Hughes, and Rush Valley arcs before we even GET to Greed.
...I dunno, I was kinda hoping that'd we'd screw that and jump right into Greed so we can get to Xing and stuff, but whatever. As long as they're planning on getting to it SOMETIME, I'm happy, I guess.