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The 29-year-old has a degree in archaeology, but like many young Tunisian college graduates has not found work in his field. Instead, Mr. Hagbei runs a small Internet cafe to make a living.

But the experience of shaping history has galvanized him and his friends. Earlier this month, they gathered in a cafe near Avenue Bourguiba to discuss the possibility of forming a new party to give a voice to young activists.

Another blogger, Tarek Kahlaoui, is seeking training and funding for a news website that he hopes will meet Tunisia’s need for independent journalism. Bloggers can be influential in Tunisia if they seize the moment, said Mr. Kahlaoui, an assistant professor of Islamic history at Rutgers University in New Jersey.

Some are going into politics. Mr. Zghaier, the activist who was tortured, belongs to the Democratic Progressive Party (PDP), a key opposition movement during the Ben Ali era. The 29-year-old, who adopted the middle name “libre,” French for free, is also a member of the PDP’s Facebook Committee, which is to help spread the party’s message of a market economy tempered by social justice.

The turnaround of Mr. Zghaier’s fortunes is particularly dramatic.

On Jan. 7, a week before the fall of the old regime, he was snatched from a Tunis street by plainclothes security agents who put a sack over his head, bundled him into a car and took him for interrogation.

For the next six days, Mr. Zghaier said, he was alternately beaten, threatened, cuffed to a wall, forced to strip and photographed in humiliating positions.

Much of the mistreatment, he said, took place in the basement of the Interior Ministry on Avenue Bourguiba - decried during the Ben Ali years as a torture chamber.

Today, the ministry is ringed by barbed wire and guarded by the military, but in a sign of the new times, its officials communicate with citizens through Facebook.

The ministry’s page, with more than 150,000 followers, explains how to apply for civil-service jobs, describes police activities and gives updates on the approval process for parties seeking to run in the elections.

As of this month, 37 were approved, the ministry said. It also listed nine that have been rejected, including some with a radical Islamic bent.

One of those behind the outreach is Sami Zaoui, minister of technology and communications in the interim government. Mr. Zaoui, a former consultant for an international accounting firm, told a French radio station last month that his first decision on the job was to lift the Internet censorship that had been enforced under Mr. Ben Ali.

The government is aware it’s being watched closely by the activists, said Fatma Azouz, a journalism professor at Manouba University in Tunis. “I am sure that those who went to the streets are capable of going again,” Mr. Azouz said. “Any government will be aware of the possibility.”