The goal for the study was to produce a baseline assessment of the networked public sphere in the Arab Middle East, and its relationship to a range of emergent issues, including politics, media, religion, culture, and international affairs. Whereas the previous study of the Persian blogosphere revealed a network organized primarily around political ideologies and topical issues, such as reformist and conservative politics, religion, and poetry, the Arabic blogosphere is organized primarily around countries. Moreover, personal life and local issues are the most important topics of discussion: most bloggers write mainly personal, diary-style observations, but when writing about politics, bloggers tend to focus on issues within their own country. Bloggers link to Web 2.0 sites like YouTube and Wikipedia (English and Arabic versions) more than other sources of information and news available on the Internet. The overall picture is one of country-based groupings of blogs focused on domestic issues.
http://cyber.law.harvard.edu/publications/2009/Mapping_the_Arabic_Blogosphere