Tal Pavel at Global Voices has written an analyis of microblogging in the Middle East:

“The massive, sustained protests in Iran this past month against the regime’s apparent falsification of the presidential election results was enabled by widespread employment of new communication technologies. “

And

“Women’s advocacy groups make good use of Twitter: for example, the Egyptian group ‘All of Us are Laila’ has fought against the inequality in women’s daily lives, in Egypt and the Arab world in general, for the last three years. So does Queen Rania of Jordan, who writes about diverse subjects on an almost daily basis, to a readership of about 125,000.”

Read The Power of 140 Characters: Twitter in the Middle East.