“ In a news vacuum, amateur videos and eyewitness accounts became the de facto source for information. In fact, the symbol of the protests, the image of a young woman named Neda bleeding to death on a Tehran street, was filmed by two people holding camera phones. “It’s incredible, the volume of stuff coming out” from Iran, said Matthew Weaver, who sounded exhausted Thursday evening after blogging for more than 10 days for The Guardian newspaper’s Web site. When rallies and conflicts occur “first the tweets come, then the pictures, then the YouTube videos, then the wires,” he said. “It’s extraordinary.” Most important, he said, what people are saying “at one point in the day is then confirmed by more conventional sources four or five hours later. „

