At the University of Washington, the Project on Information Technology and Political Islam, aka P ITPI, has released a new study titled, "Opening Closed Regimes: What Was the Role of Social Media During the Arab Spring?".
"After analyzing over 3 million tweets, gigabytes of YouTube content and thousands of blog posts," the investigators concluded "that social media played a central role in shaping political debates in the Arab Spring. Conversations about revolution often preceded major events on the ground, and social media carried inspiring stories of protest across international borders."
You can download the report here.