From the BBC [tip from Instapundit.com]:
"Hundreds of Iranian online journals have been protesting against media censorship by renaming their websites after pro-reformist newspapers and websites that have been banned or shut down by the authorities. Many of the websites, known as blogs or weblogs, have also posted news items from the banned publications on their websites. The protest was started by blogger Hossein Derakhshan, a student at Toronto university in Canada. He told the BBC that although he felt the action was symbolic, he wanted to show Iranian authorities 'that they would not be able to censor the internet in the same way as they have managed to control other media.'"