While it seems that the Iranian government might be censoring some parts of the Internet, Twitter seems to be the tool of choice for opposition activist who want to word of protests.

Iran's government has silenced traditional media after the country's disputed presidential election and so Iranians have turned to Twitter. It is being used to organise, send pictures and messages to the outside world as the events happen and it is stuffing up any government attempts at censorship.

No one seems to believe the state media and they started to create Twitter accounts because they heard Twitter was the most efficient way to discover and share what was happening in the moments.

Of course the government has blocked Twitter but there are lots of sites that allow them to post tweets and allow them to read tweets from others. Mobile phones can be used but Iranians are still banned from sending SMS messages.