>> I like seeing maps done in gaming software...just to see what's possible. I've tried the Neverwinter Nights one and the Middle Earth one...with horrible results
Dwarf Fortress has an amazingly powerful map generator. Not counting all of the settings you can give it there are roughly a billion seeds you can use to create maps. There there are the actual parameters...69 of them by my count that effect the landscape itself--I'm counting subregion size as an applicable variable, along with caves which are location features (like buildings)--with another dozen or so for the historical events (History has its own seed value too! That's a billion histories on each of a billion possible worlds!).