CNET reports that the Iranian government blocked email and social-media access for its entire citizenry Friday morning.
"An individual inside the country confirmed this morning that Gmail, Hotmail, and Yahoo email are no longer available. Ditto for Facebook. So far, the government has not made any announcement about the service interruption… the Iranian noted that the regime has cut off the Internet during protests and that the buzz on the streets is that anti-government protests are planned for Saturday. February 11 marks the anniversary of Iran's 1979 Islamic revolution."