This is one of the most interesting things I've read on the internet EVER. Ken Davenport, producer of the Broadway revival of Godspell wrote a daily blog starting 100 days before previews with insights into how it all comes together. I know it won't be at all interesting to some, but people in the theatre, you should read this. I read it in basically one sitting cause I couldn't peel my face away from the screen. We do a less elaborate version of this with every Pickleville show we put up.
Here's the link to the first post, then you just click the next button to read them in succession. Enjoy!