The Los Angeles Times notes that Ben Silverman, NBC's chief programmer, has described himself as a "next generation, rock star" TV executive. Last weekend he was in New York: dining with actress Brooke Shields, popping up on the set of the season premiere of "Saturday Night Live" and hobnobbing with advertisers at an NFL game. In his 15 months at the network, Silverman has set off more chatter about his lifestyle, job status and time away from the office than buzz about his upcoming shows. NBC's new season, which kicks off Monday, will help determine whether NBC Universal extends Silverman's employment beyond June, when his two-year contract expires. That is, if Silverman doesn't decide to leave first.