I just started a play by post campaign with some real life friends of mine who have since been scattered to the winds. I'm modifying the core setting created in 4th edition dungeons and dragons (Fallcrest, Nentir Vale, Nerathi Empire, etc.)
I don't plan on adding any new players, but anyone can feel free to lurk, and if someone has critiques/advice on my execution of the ACKS rules, I'm all ears.
So far, converting the nentir vale has been very interesting. I had to take some liberties with the sizes of settlements.I gave fallcrest 2000-ish families instead of 2000-ish people, and counted the surrounding farmers as part of the city rather than a very very tiny domain (thus assuming there were still more farmers slightly farther out). Even with the bumps to population size, the city is doesn't have a trade radius sufficient to create a trade route between any of the other settlements on the map. I suppose that will make it simple for players to find lucrative trade routes!
edit: I was _Thinking_ about switching from 2000 people to 2000 families, but ultimately decided against it. Fallcrest is but a meager class V market.