Apparently hoping to counter a raft of negative publicity concerning its reality show Kid Nation, CBS has begun showing a pilot episode to advertisers. The series is set to debut on Sept. 19, but the network has been hit with demands from child-welfare groups that it be canceled. A CBS spokesperson told today's (Friday) New York Post that the show was "well received" by some advertisers but that others took a "wait-and-see approach." In a statement, the network said, "A cautious approach from some advertisers to a show generating this much attention is very common."