Well, I'm back in town, but I'm in the middle of moving right now, so my computer is all boxed up. If things go well, I should be able to play some more next week.
I did some experiments before I had to leave town. If you can get your population up to 80+ before you cull the herd, you will qualify for sieges. Forever. Being faced with a full siege situation with only 7 dwarves is a pretty novel experience. I don't think that it is winnable without extreme trap exploitation. It would make for an interesting engineer's challenge, but a poor soldier's challenge. It's something to keep in mind for people who want an extreme Terrorforming game.
Starting out without any food or drink is actually a viable challenge, and is really fun. It is just barely possible to gather enough wood, seeds, and meat to avoid losing people to attrition, but securing the outdoors long enough to do this is very dangerous. I'm tempted to "reboot" the game and start fresh under these new and very exciting conditions. We'll see when I'm settled into my new place.
Also, I'll finally get off of my ass and upload the maps to the database so everyone can experiment with the scenario.
I hope that my OoC style isn't putting too many people off. I'm just not interested in writing fanfiction, and wouldn't be very good at it if I tried.