PaizoCon 2012 Ultimate Campaign (Banquet Stuff Part IV)
This book scheduled for Spring 2013 gives tools to, yep, run a campaign. It will include details on running downtime, like building a keep, raising puppies, etc. It will also bring in the (expanded) kingdom building rules into the core rules. So...those of you hoping for mythic rules, I guess you'll have to wait until GenCon for that announcement!