If you've ever done anything at all in travel ball you probably already know everything there is to know about East Cobb, so I won't open that subject up -- you probably know more about them than I do anyway.
But another team from that area is the Chastain Bulls, if they're still together. They made the USSSA "Elite 16" as the eastern regional champs as 14u's in 2004 and I think also did well as 15u's last summer. I think they are still based north of Atlanta but don't know if they consider kids from out of their own area. I think they are pretty locally based. But I got to talk to a lot of the parents off that team a couple of times and they seemed like a level headed bunch, not the throat straining, neck vein bulging, screaming type if you know what I mean.