On the front page of the site where it lists the trading post categories now would be replaced with georgia, florida, etc. Then once you click the state you want you will be taken to a page where all the regular categories will be located, it would look just like it does now. So every state or region would have it's own firearms & optics forum, it's own automotive sales forum, etc.
I like this idea. At the most would only be another click or two.