Here's my first release, as it were. I've tweaked the world a bit, fine-tuning placement of mountains and things, and getting my evil swamp-and-mountain spoke for the goblins. I advanced it to year 100 to get more population and a second dwarf site- hopefully to increase the variety of ores available at start. (I also removed the glacier corners, because they were stealing caves from the mainland.)
Goblins appear to preferentially take the highest mountain type available for their fortresses.
I did some testing, and (all else equal) a temperature of -1 yields badlands, -30 yields glacier, and -100 is still glacier. So it probably transitions at -25.
I found at least one site that may satisfy my requirements: HFS, bottomless pit, underground river, magma pipe, sand, ice.
I seem to be getting a lot of titans at world gen. I checked and all megabeasts are BIOME: ANY_LAND. What can I do to get more variety?
I looked at the world sites and populations and didn't see any beak dogs or trolls. Does that mean the goblins won't have any? Beak dogs are supposed to be in either temperate or tropical swamps (mine are temperate). And do I have to make the mountains evil to get trolls? That could take some serious work, haha.
UPDATE: New download link:
http://www.mediafire.com/download.php?njoyjmnzz4mNOTICE: Please, if you quote, remove the pictures. It'll make things more compact.