What a coincidence, as I just posted a similar idea (one I'd held back on for quite a while) in the Marathons area. Even scarier, our lists are identical! (except for Peeping Tom as I was proposing a P&P marathon, not just Powell.) Hope you saw, A Canterbury Tale is out in a month or so on Criterion DVD.
How nice that you got to meet Thelma Schoonmaker. The most I can boast is that I listened to the repeat of her interview on Fresh Air with Terry Gross on NPR over the July 4th week. Good stuff if you missed it, and you can stream the interview online from freshair.com. (Assuming, we're all friends of public radio around here.) Actually today's show sounds good too -- Robert Downey, Jr. and Steve Coogan, and David Edelstein reviews Mamet's Edmond brought to the big screen.