Observer contributor Niall Stanage, who is currently on assignment in Iran, sends an email for our "general amusement" to say that it is possible where he is to access the sites of the New York Times, Washington Post, the Guardian and the Times of London, but that attempts to get to the New York Post, the Sun, Gawker or Wonkette are met with "a disappointingly literal 'Access to this Site is Denied' together with some Farsi script presumably saying the same thing."
I can't quite figure out if this list tells us more about the Iranian censors or about Niall. But there you have it.