Sami Ben Gharbia the recently appointed Advocacy Director of Global Voices has done a very extensive review of the censorship situation in Pakistan which also includes a very interesting interview with Omer Alvie discussing the issue in quite extensive detail. Link: Pakistan: Online freedom of speech as collateral damage?
Do also have a look at the presentation I gave on the topic ‘Silencing the Pakistani Blogs‘ practically one year back in Manila on the occasion of the three day meeting of Free Expression in Asian Cyberspace, Sami was kind enough to create a flash video out of my entire PowerPoint presentation (slides, audio).