Gah. World generation work continues, although haltingly. I had a couple more annoying bugs. I seem to remember programming being easier than this. I continue to forge ahead.
The feature I just added, and took me so long, is world regions. That is to say, each world won't be a homogenous area of similar terrain, but will be "themed." This allows the game to tweak area creation by contiguous areas of the map in an intelligent way.
Man, when I see Tarn Adams chugging away, adding new features daily, I get intensely jealous.