If you have yet to watch "A Personal Journey with Martin Scorsese Through American Movies," then by god do so. It's fucking great. Here's the first 10 minutes.
<http://www.youtube.com/watch?v=DTbNv-P_9fg>
.........
Yes, it is indeed tremendous.
It's on TCM's schedule so I've had a chance to watch it several times.
Not only that, Scorsese has been a guest on TCM programs on numerous occasions to discuss his work and movies in general (hell, even to do something as fan servicey as explaining the benefits of letter-boxing wide screen films).
Just one of the reasons why, without fear of wind or vertigo, I call that network a national treasure.
.d.