@Rex: The 40d Dwarven fortresses took advantage of the sliced 3D as well, though they just managed to make a complete mess of a labyrinth that made it impossible to find the dwarven leader to report your successful quests with it.
As for the Slaves to Armok, I don't think there is anything still hanging around. You might be able to dig something up on the locked board related to that game, but I wouldn't know. As for 3D personally I would rather take updates and new content then 3D graphics since those exact graphics were the reason Toady didn't make DF 3D. That's just me though, I mean you can hold whatever opinion you want.