Today is Free Mojtaba and Arash day. All bloggers were asked to put this link on their blog to try to draw attention to two bloggers who are currently being held by Iranian authorities - although Mojtaba isn't actually in prison now but is awaiting charges.
Essentially their charges relate to stuff they posted on their blogs, so it'll be interesting to see if the whole movement has any effect.
The blogger action stuff is also mentioned on the BBC website
This is my first attempt at posting a banner so I hope it works.