I had the opportunity to interview Tarn Adams (audio and transcript available), who programs the game, for the game preservation project I worked on in school (all interviews are here at the Center for American History). Tarn is a standout guy, who is awfully generous with his time considering the colossal task ahead of he and his brother. He gave a great interview that illuminated important parts of their game-making, which is in kind with the idiosyncratic and singular quality of Dwarf Fortress.
Check out the NYT interview — Tarn has thoughtful and provoking comments on playing games these days.
And, if you haven’t tried Dwarf Fortress, give it a go sometime. I played it for a year on and off – one day I’d like to make a return to it. It’s not as hard as all that, really – although you should have the wiki open as you play.