How about creating richarddawkins.net extensions for each state and country? You want grassroots organizations from each state, which I think is an excellent idea, however pooling resources for all of us may be the best way to start. Why not use your existing site as a launch point for interested parties to get them started? Perhaps you can create webpage's for each state from the parent richarddawkins.net such as:,
richarddawkins.net/alabama
richarddawkins.net/maine
richarddawkins.net/florida,
etc.

Allow these fledgling organizations to post their organizational data and any pertinent information. That way each branch can feed off each other as good ideas come along. You have a multitude of bright and articulate people on this site. It will allow them to aide in establishing many of these organizations and keep us all up to date. Such an addition should not cost you a penny more in server space. I think we call that internet evolution :o)