IGN has a huge 6 page interview with Ken Levine of Irrational Games. It includes a whole raft of new information as well as a plethora of screenshots and concept art, some of which have appeared in recent magazine articles.

IGN: At this point in the history of videogames, we've experienced both linear and open design games. They both have their strengths and weaknesses. What are you going after in BioShock? Are you going to create some linear sections and some open sections?

Ken Levine: It's probably much like System Shock 2, in the sense that the world is open and you can go back and forth between the entire game. There are no levels, per say. I mean, there are some loads as you go from one area to the next, but you can freely go back and forth in the game as you progress. Our goal has always been a little different than say, a Deus Ex game, where you can follow this geometric path or that geometric path, in terms of that hallway, that hallway or that hallway. It's more like this: We give the player a broad set of tools and we say, "How do you want to handle this problem?" "How are you going to approach this problem set in the game?" It's a huge amount of choice. And we have invested a huge amount of time and research into our AI.