Slashdot linked up news of The Making of Star Wars, which bills itself as the "definitive" account of how that movie was created. By using a previously unknown collection of interviews conducted by a Lucasfilm publicist made with the principles between 1975 and 1977, the author was able to create what he termed, "as close to an oral history as I could."
Considering that modern interviews with said principles tend to produce a lot of, "I just don't remember" quotes and screwy, "Nerd! Nerd! Get away! Get away!" looks, getting these sources to the public should be a real achievement. Well, to nerds anyway.