There are reports of about 3M ppl out on the streets. Millions of people marching in absolute silence.

PlayedMousavi's song with my piano, leaving all the windows open, and was greeted by calls of "Alaho akbar"!

Those are recent tweets which probably tells you more about the mood than hard facts. But mood matters. Al-Jazeera's official account:

Tens of thousands of Iranian's have rallied in the country's capital in defiance of a government ban to protest against the re-election of Mahmoud Ahmadinejad, the Iranian president. In his first public appearance since the elections three days ago, Mir Hossein Mousavi, the defeated presidential candidate, told supporters at the Tehran rally on Monday that he would take part if new elections were called. "The vote of the people is more important than Mousavi or any other person," he said. The demonstrators headed toward the capital's huge Freedom Square in the largest display of opposition to the election results to date. "Mousavi we support you! We will die but retrieve our votes!" shouted supporters, many wearing the trademark green colour of Mousavi's election campaign.