OnTheCommons has an interesting post about a new book called Understanding Knowledge as a Commons. This sounds great - see Peter Suber's comment below for details on open access to its contents. but sadly - and ironically - seems not to be open access (though I'd bet that Peter Suber's contribution to the collection is doubtless available somewhere),. However, tThis article did mention something I'd not come across before: the Digital Libary of the Commons.
This turns out to be a wonderful resource:
a gateway to the international literature on the commons. This site contains an author-submission portal; an archive of full-text articles, papers, and dissertations; the Comprehensive Bibliography of the Commons; a Keyword Thesaurus, and links to relevant reference sources on the study of the commons.
Among the list of commons areas, there is Information and Knowledge Commons:
anticommons, copyright, indigenous, local, scientific knowledge issues, intellectual property rights, the Internet, libraries, patents, virtual commons, etc.
Strange that free software is not included. But good, nonetheless.