Katie Couric of "Today," Diane Sawyer of "Good Morning America," and Bryant Gumbel of "The Early Show" are three of the nation's biggest media stars. But are they journalists or glorified hawkers? According to a report by the Project for Excellence in Journalism, which studied the three network morning shows for two weeks in June and two weeks in October, these programs spend an awful lot of time selling things to the public. ... Even given some slight moderation after the Sept. 11 attacks, the report suggested that the shows were becoming a "kind of sophisticated infomercial."