If you haven't seen Hard Knocks before, especially the 1st season with the 2001 Baltimore Ravens, you can watch it online now care of Hulu and the NFL Network. It's a great watch.
I didn't know that a preseason game was ever cancelled until watching it (the first game at Philadelphia that year). It was Todd Heap's rookie season. Tony Siragusa was hilarious. Brian Billick was, well, articulate and thorough. Marvin Lewis was passionate. And Rex Ryan... well he doesn't make too many appearances.