HuffPo contributor Josh Shahryar has been a reliable source:
Status Update15: Rumors of Zahra Rahnavard attending protests in Tehran - can't be confirmed
Status Update14: No major reformist leader was present during the protests.
Status Update13: Clashes in Shiraz and Hamedan - many injuries in Hamedan
Status Update11: Outside Tehran, number of protesters in most cities in the hundreds and not more.
Status Update6: Number of protesters in Tehran between 5,000-10,000
Status Update2: Confirmed Protests in Tehran, Mashhad, Shiraz, Isfahan, Kerman, Kermanshah, Arak
ABC News' Lara Setrakian adds:
Speaking to students sunday, Rafsanjani called for a 'climate of freedom' in #Iran, accusing leadership of intolerance
Opposition supporters say yesterday's Rafsanjani speech was 'very, very important timing' ahead today's student rallies
Veteran twitterer Omid Habibinia is still going strong, and also live-blogging for France 24. Here he relays a dramatic account from an Iranian on the ground:
I'm stuck at the Talegani and Valiasr crossroads. The police and the Basij (the Iranian citizen militia) have closed both sides. The Basij are beating people with batons. There are a lot of people, certainly more than on previous student days.
They're coming! [She's starts running].
There are people at the Enghelab [Revolution] Square.
And there are clashes at the Talegani and Valiasr crossroads.
They're arresting a lot of people and leading them away, but people are trying to rescue them.
We've just stopped a Basiji and stolen his motorbike near to Enghelab square."