More than a third (37%) of traditional journalists now contribute to Twitter and 39 percent produce content for a blog as part of their expanded duties, according to a new PRWeek/PR Newswire Media Survey. "Across the board you can see a change in journalists' behavior," said Sarah Skerik, VP of distribution services at PR Newswire . "Journalists are doing more with less. They seem to be acting more aggressively about finding their stories,