I found this via boingboing. First up, I haven't read it all yet, but here is a transcript of 5 days (or so) of meetings between George Lucas, Steven Spielberg and some other dude discussing their plans for Indiana Jones back in the 70's.
More interesting is this analysis of the whole thing. Buddy read it and created a set of observations and rules based on how they broke down the story. Very interesting. I might have to further check out his site.