I watched the documentary Countdown To Wednesday...and it wasn't bad. Taught me a couple things about the industry that I didn't know...mostly on the business side, but a little about inking, colouring, and lettering. Has a lot about Top Cow and what goes into their production, but Mark Waid, Paul Dini and Stan Lee all have something to chip in.
The production of the film sucks, with typos (can't really complain about that now can I?), and some strange takes, but the information is solid.
You can buy it here...or rent it at a good video store.