Visualising the Egyptian revolution through Twitter
There’s another interesting visualisation of Twitter influencers during the protests on Kovas Boguta’s blog. He does offer more analysis of his Influence Network graphic suggesting that there is an intermediary group of influencers who connect journalists, NGOs and "foreign policy types" to activists on the ground.
It seems to me that this group plays a similar role to "bridge bloggers", or "bridge figures" who are able to illuminate and mediate the concerns of one culture to another through their experience of both.
Boguta also notes that the protesters willingness to tweet both in Arabic and reach out to the rest of the world in English was a key difference from Iran in 2009. In the latter case, he suggests that "connections between those in Iran [who were tweeting in Persian] and the rest of the world were very thin and easily severed".