In the face of a tightening government grip on all things viral, Iranians have managed to circumvent the communication restrictions laid upon them to tell the world their story in ways previously thought to be reserved only for social networking. For anyone who has so much as glanced at the news during the past week, Twitter has been the name of the game for Iranian protesters.

With a limitation of 140 characters per post, only the most pertinent information is tweeted—rally locations, real-time updates, and details only those on the ground can see. While sites such as Facebook and Twitter have been blocked off before, Iranians have continued to gain access to them via proxies, servers that allow users to access another site through them. Proxy sites are continuously being updated in an effort to stay one step ahead of the Iranian government’s filtering apparatus.

The Iranian government’s strategy for blocking the flow of information appears to be two-fold. Foreign news services have all been asked to leave (just this morning, the BBC reporter Jon Leyne, one of the few reporters left, was given a similar request) and the internet speed has been slowed to a snail’s pace. According to the Wall Street Journal, limiting bandwidth in this manner is meant to discourage and frustrate users so much that they’ll give up.

This strategy is, for now, not working. Iranians have harnessed the internet in ingenious ways—from their Twitter posts to uploaded YouTube videos. All major news networks have caught on to the phenomenon, allowing the messages coming out of Iran to truly reach the entire world.

Samah Choudhury contributed to this post

Today is the first official day of Amnesty International’s 2008 Global Write-a-thon! Over the next week and a half, thousands of people around the world will be writing letters on behalf of prisoners of conscience, human rights defenders, and other individuals at risk. Because so many people around the world are participating, authorities will receive a tidal wave of letters appealing for the human rights of these individuals, and they will find it hard to ignore.

There has already been a huge amount of interest in the US. Over 6,800 people have registered on the AIUSA website, pledging to write over 185,000 letters, and there has been support from different blogs, as well as on Facebook. There are even resources available in Spanish.

If you have any doubts as to whether or not your participation can really make a difference, all you have to do is check out this letter from Sami al-Hajj, a former Guantánamo Bay detainee who was featured in the 2007 Write-a-thon, or read about some of the other successful cases.

Just because the Write-a-thon starts today doesn’t mean it’s too late! All you need is a pen, paper, stamps, and the desire to change someone’s life.