Any luck? This sounds like a very interesting problem...

I have written code to generate land masses, but when it comes to populating them with biomes, I get all stuck trying to do it "properly" (taking rain shadows and trade winds into account, etc, etc) and end up just "faking" it, lol. And then I steal the tables out of the AD&D 1st Edition Wilderness Survival Guide for generating temperature and weather, haha.

I guess it gets easier when you have a virtual land mass based on a real-world one like y'all do! That is cool. I need to make more time for writing code again... Maybe when my house is fixed up a little more... ... ...