Need further proof that Survivor fever is sweeping the nation? This week's episode not only scored the show's highest ratings yet, but also became CBS's most-watched telecast of the season, topping February's Grammy Awards. According to final data, Wednesday's installment, featuring Colleen's swan song, netted 28 million viewers, up from 27.41 the previous week. And the contestants are wasting no time cashing in on their newfound celebrity. Survivor finalist and possible winner neurologist Sean Kenniff will appear on Guiding Light for three episodes in September playing a doctor, a show spokesperson confirms. Meanwhile, a UPN rep tells TV Guide Online that Survivor exile Gervase Peterson will not be playing himself when he guest-stars on The Hughleys this fall in an episode that spoofs the reality show.