Yea, Laww is right. I've been sittin in IRC doin a lot of Troll logging and they've yet to really answer some of the questions, which is purposeful do to the fact that I believe a lot more is temp hard-coded than they really want hard coded so that they can test compatibility and stability, etc... which makes sense.
By the looks of it they might have used Maya, though I doubt it, 3dstudio max is a good guess on it, I know almost everyone uses it. My main guess would be to take a look at the file structure so far though, they seem to have all pretty self-explanatory once you look at it, so when the full thing comes out we'll be able to get our hands dirty.
Also, FOR ALL MODDERS, try to get little groups together to work with you, I know we all love our own names on projects, but collaborative effort can produce some really amazing things, especially in a more "complex" game like this. I am looking forward to working with some of you, even if it means me just playing around with yer mods tryin to break them
So yea, it'll be fun! And migrate yer arse over to the modding section.