Status Updates From I'm a Lebowski, You're a Le...

It isn't a wonderfully crafted book, but darn if it isn't compelling. It's amazing that the authors interviewed everyone who had an impact on the movie. It started with the actors and writers. Then they interviewed all the real life inspirations for the characters.
What is the gradient for "real life inspiration"? Someone had to be Princess Amidala, but that's a lot harder than being Walter Sobchak.