http://courseware.hbs.edu/public/cases/wikipedia/
The Harvard Business School is famous for its case studies. Two of its professors put out a case study on Wikipedia, and the history of the Enterprise 2.0 article (a new term championed by one of the case study authors; the article was written by others who use the term).
I have a cameo as the admin who recommends starting a new AfD discussion.
The whole study is released under the GFDL, though it will be available for sale via CD as per usual with new case studies.
Don't forget the check out the exhibits, which are fascinating.
--SJ