Hi all,
I'm not on much these days but try to stop in to look at members' contributions whenever I can. I'd delurking now to mention a game I think might be interesting to my fellow cartographers who are also designing settings. The Microscope RPG is billed by creator Ben Robbins as ”a fractal role-playing game of epic histories”. My co-GM and I have been experimenting with it and believe it's potentially an excellent tool for designing histories and the settings they describe...and the stories behind maps, maybe.

I've written about a few of our sessions on our group's gaming blog if anyone's interested:
Vancouver WA Gamers

You can filter the results to just Microscope by clicking that tag, of course...or you can read about the other stuff we get up to in our group. The blog is relatively new and a work-in-progress: I've yet to fill in some of our historical game info or much about us, but it's start.