[Air-L] Readings on online advocacy?

Hi all, Can anyone recommend some good readings for college seniors on online political advocacy? Ideally they would tie some of the most well-known communication or collective action theories like framing, agenda setting, resource mobilization, etc. to case studies of how activists have used social media and other online tools. Thanks, Luis - - - - - Luis E. Hestres, Ph.D. More about me at luishestres.com