I just wanted to point out an excellent read by Ravencrowking. You can find it here:
This is quite timely. My group and I are each creating a basic setting concept to "pitch" as our next setting. We have been using the Northern Reaches , which has been great, but it leaned heavily on the RBVancouver and NYC groups.
I'm going to base my concept on The Spine of the World and push/pull the idea around to get what I want. I've started the most basic of fundamentals and plan on pecking away at it over time. I'll post on it periodically. Check out Raven's pdf, it's very good.