The access to information and freedom to communicate with others that the Internet allows is a major problem for dictators. That is why China has the Great Firewall and blocks Facebook and Twitter, why Iran controls access to online sources and why Libya and Egypt literally pulled the plug on the Internet connections.
It didn’t work in Egypt. More and more people in Iran and China are working their way around the government efforts. And now more info is slowing coming out of Tripoli as people do techno work-arounds.