Simon Dunn has found something splendid on the internet. It's called the Archive of American Television, put together by the EMMY people. To say it's in-depth is an understatement. There are hours and hours and hours of interviews there. The first names I found that I really wanted to hear from are the Charles brothers (Les & Charles) here. They don't seem all that talkative, which may be a surprise given the length of the interview, but I'm sure it contains some really fascinating insights.