A few minor tweaks were made to the system this week, but the big news is the Overview of Oz that I just uploaded. It's starting fairly small, with only one location representing each of the four countries in Oz, but it will be expanded as my resources develop.
One thing I discovered is that Munchkinland is boring. All of the other lands of Oz are fairly well explored in the stories, but Munchkinland receives little attention. It's one of those places that everybody comes from, but nobody ever goes.
My target was to come up with 5 locations from each land, give options for players who wanted their character to be associated with each location, and give the Narrator some adventure hooks to lead players in exploring each area. Quadling Country was easiest, and Munchkin Country the hardest. While the other countries might merit supplements of their own, it's likely that Munchkin Country will exist primarily in the core book.
While it's true that later Oz authors did expand on all of the countries, not much of that material has fallen to the public domain. One of the benefits of this project is that it can be done on a shoestring, which is all I have at the moment.