A relevant book and a bevy of articles on peer production emerged recently:
Bastard Culture! How User Participation Transforms Cultural Production by Mirko Tobias Schäfer
…and New Media and Society bringing it in the recent edition:
The limits of peer production: Some reminders from Max Weber for the network society by Daniel Kreiss, Megan Finn, and Fred Turner, New Media & Society 2011;13 243-259 http://nms.sagepub.com/cgi/content/abstract/13/2/243
Factors influencing the willingness to contribute information to online communities by Xigen Li, New Media & Society 2011;13 279-296 http://nms.sagepub.com/cgi/content/abstract/13/2/279
The popular culture of internet activism by Tatiana Tatarchevskiy, New Media & Society 2011;13 297-313, http://nms.sagepub.com/cgi/content/abstract/13/2/297
Cooperation with the corporation? CNN and the hegemonic cooptation of citizen journalism through iReport.com by Farooq A. Kperogi, New Media & Society 2011;13 314-329, http://nms.sagepub.com/cgi/content/abstract/13/2/314