The first part of a 13-part documentary series chronicling the making of Star Wars - Episode I - The Phantom Menace.
Part 1 is all about George Lucas writing the film from 1994-1997, and some of his hopes for the upcoming trilogy, of which he was not considering directing at all.
Mod Edit: Bobson Dugnutt also has an ROTS ‘Making Of’, here - Falling Into Darkness: The Making of Episode III.
I hope he does an AOTC version too.