Some shops in the city closed or placed black cloth over their doors as a symbol of condolence. Bazaar workers in Tehran and the city of Tabriz were reported to be on strike in protest at the election result. (emphasis added).
With today’s other events, it is likely that this bit information will be overlooked. Its importance should not be discounted, however. As I noted here, the Bazaaris represent an eminently important demographic in Iran – and one that has historically tolled the success or failure of uprisings. No other reports that I’ve seen have confirmed or elaborated on The Guardian’s report, but should it be true it would represent a significant boon to the Iranians rising in the street.
UPDATE: persiankiwi via Sullivan -- Tehranis to flood the Bazaar in a twist on the classic strike. Not quiet the same as the Bazaaris joining the movement but, I imagine, the Bazaaris have either signed up for this or it will become clear very quickly that they are not with Mousavi's movement.