I have written a number of "Making Of..." articles about my work on The Matrix. See the official Matrix site and go to "Crew Articles" under "Mainframe", or go to directly to them:
I also wrote articles about my work on the APU which appears in both The Matrix: Reloaded and The Matrix: Revolutions. The main APU site contains my article and is part of the official Matrix site. There's also a longer interview with me.