Didn't see a better forum for this thread. Here goes:
I thought up an interesting challenge in my waterfall-that-goes-in-two-directions-essentially-giving-me-three-landmasses fort. On a single embark map, divide your dwarves into several categories, and assign them different areas of the map. Build them their areas, and then seal them in. From that point on, you have multiple mini-fortresses, that may only grow via careful use of migrants/bridges. Or have one main fortress that takes all the migrants, trades, etc, while the others are smaller, generational fortresses.
Each fortress must have its own food source, booze source, etc, be capable of crafting its own materials of every kind for its current and growing population, and defend itself against sieges, FB, etc. If you feel like pitting squads from the multi-fortresses against each other, that's up to you.
Ideas:
-Embark over a river that splits in multiple directions, each landmass gets its own multifortress
-Surface/Underground/Caverns
Flavor Suggestions:
Give each multifortress a theme: Dwarf Hippies, animal lovers, warriors, etc.
If you're doing a succession game, the multifortresses could be rebels, outcasts, survivalist types, etc.
This would be a good way to ensure the fortress lives on in case of extreme !!fun!!, and an interesting way to do !!science!! !!FUN Science!!
Bonus points if you do this straight from embark. 3x male/female pair multi-fortresses, 1x female multifortress?
.....do dwarves breed by spore, like animals?