I've been meaning to write about this for a while now, but I'm ashamed to say that other things have kept distracting me.
A few months ago Amnesty International commenced a campaign to raise public awareness in the blogosphere about bloggers who have been persecuted because of their writings. According to Amnesty, "Iranian blogger Kianoosh Sanjari [is] just one example of the dangers that some online writers can face. Mr Sanjari was arrested in early October following his blogging about conflicts between the Iranian police and the supporters of Shia cleric Ayatollah Boroujerdi" (BBC News website, 27 October 2006).
Amnesty has launched a web campaign, where bloggers and other websites can pledge their support for efforts to protect free speech on the web. For the tech savvy, they also provide an HTML fragment that you can place on your blog or site which will include snippets of censored content each time your page is loaded. I'm going to add it to my site right away.