http://www.style.fm/as/13_special/mini_071001a.shtml
Holy shit, for anyone that can read Japanese this is a sakuga fan's dream come true. This interview with the director disects each part of the process of the film, down to how various parts were created and which animators are responsible for keyframing and storyboarding the various scenes. It also covers the production of the movie and explains why the pilot version was shown 4 years ago while the movie is only complete now. A really, really great read.
