The re-election of Iranian President Mahmoud Ahmadinejad over challenger Mir Hussein Moussavi sparked demonstrations, and coverage of the protests led to the ouster of Western journalists. Twitter users stepped into the information gap, providing real-time updates. But the popular microblogging site also became a vehicle for protesters to launch denial-of-service attacks. While the conflict in Iran and the role of technology in keeping the world informed about it is our top story, for a whole lot of people the focus of the week was on — what else? — Apple’s new iPhone 3G S, which went on sale Friday. We confess to momentary early morning confusion about the line on Boston’s Boylston Street until we realized it was outside of an AT&T store. D’oh.