I am listening to KRSI (Radio Sedaye Iran) right now. There are many Iranians calling (from Tehran, and Gorgan, etc.).
All reports indicate that almost every neighborhood in Tehran is on fire. People are throwing home-made bombs, Molotov cocktails, etc. into the homes of mullahs, and burning pictures of Khamenei in complete defiance of his recent edict to mourn during the month of Muharram.
Let's hope it's true. May the mullahs' fall be fast and hard.
UPDATE: On the other hand, things look pretty quiet through these Tehran webcams for whatever that's worth. Tehran's a big place. (And for all I know these are images of last week, though I doubt it).