I've been interesting in making maps for fictional worlds for a while now, somewhat for its own sake (somewhat for occasional spec. fic. stories I write) and have been looking for a place to really delve into the details. I'm a pretty 'science' driven person, so the fact that the fora include threads discussing that aspect (and even a "river police", lol) is a huge plus for me.
:-)

I'm hoping to eventually create worlds in Blender just for the heck of it but that adds "learn Blender" to "learn how to create workable fictional worlds", so we'll see....