I wish I'd come to this forum sooner. This Chain Game sounds awsome! (I'd ask to be an alternate, but there's kinda already 5 people...)
A while back, I thought about starting a sort of Collage Project, where everyone would be given so many maps and so many slots in the resource bin, etc. and it would all be done simultaniously, with the only shared knowledge being the central plot idea, the characters, etc. and then just slapping it all together. This is way better (though it takes longer :P).
P.S. Maybe for all the people who didn't get involved in this one, but wanted to, we could start a second chain game? (or is it a fourth?)