Most people who spend any time at all on the internet are familiar with the Wikipedia. This collaborative effort is one of the most remarkable reference works in existence with information available about any subject you can imagine. Jon Udell has studied one Wikipedia page and tracked it over its entire life and captured that history in a web cast. The "movie" that comes out of this study is a fascinating look at how information is created and modified on the Wikipedia, and even how cultural sensitivities come into play in determining what information is "appropriate" to share. Highly recommended viewing.