Here's a bit more info:
"Leonard examines the real costs of extraction, production, distribution, consumption and disposal, and she isolates the moment in history where she says the trend of consumption mania began. The Story of Stuff examines how economic policies of the post-World War II era ushered in notions of “planned obsolescence” and “perceived obsolescence” —and how these notions are still driving much of the U.S. and global economies today. Leonard’s inspiration for the film began as a personal musing over the question, “Where does all the stuff we buy come from, and where does it go when we throw it out?” She traveled the world in pursuit of the answer to this seemingly innocent question, and what she found along the way were some very guilty participants and their unfortunate victims."
It'll definitely teach you something, and will certainly put a whole new spin on the way you view your own stuff.
The Story of Stuff Project also recently came out with their short film The Story of Cap and Trade and two other films—The Story of Electronics and The Story of Bottled Water—are in the works. See more and read more about the project here.