Christian Moran has put together a well researched, excellently documented and balanced biography of Walt Disney, his work and vision. It's a bit long for casual viewing (100 minutes) but it hits all the significant elements of Walt's drive to use technology in ways never done before. The commentary is factual, accurate and intelligent. I really can't recommend this production highly enough.
There is a companion book, but we're going to have to wait for a DVD.