Among the latest developments: Opposition candidate Mir Hossein Mousavi called on his supporters to continue their protests; the government arrested and later released the daughter of former president Rafsanjani; and a Newsweek reporter has been detained.
Today's relative peace followed a day of bloodshed in the heart of Tehran, as CBS News correspondent Elizabeth Palmer reports.
It was a calm enforced by an intimidating security presence on the streets. As people absorbed the shock of yesterday's violence, Iranian State TV announced that 13 people had been killed in clashes between security forces and protestors.
While the blogosphere hummed with new images of confrontation and casualties, one became instantly iconic - Neda, said to be a 16-year-old girl shot dead in Tehran, surrounded by those trying in vain to save her.
The last cell phone video image of her bleeding face was quickly made into an electronic poster, seen on social networking Ineternet services worldwide.
But President Mahmoud Ahmadinejad didn't mention the violence when he showed up on television Sunday.
His message to a group of clerics was that the election had proved the Iranian people's love for the regime.
As the frenzied Ahmadinejad election rallies clearly showed - the President does have genuine and passionate core support.
But millions of Iranians dislike him just as passionately. That's what drove them into the opposition camp. From defeated candidate Mousavi, there was a carefully worded statement:
"Protesting against lies and fraud is your right," said a notice on his Web site. "Today the country mourns for those killed. Remain calm."
As a sign of the colossal power struggle going on at the top of Iran's regime, a previously untouchable figure - the daughter of Grand Ayatollah Hashemi Rafsanjani was detained overnight.
Rafsanjani is the most powerful of the opposition movement's backers.
While his daughter was released, scores of other human rights activists, bloggers, reporters and protestors remain in detention after a wave of arrests that began last week.