In its first collaboration with TV producer David E. Kelley, the WB Network has greenlighted the quirky drama pilot "Halley's Comet." In the tone of Kelley's "Ally McBeal," the project centers on a young cancer survivor who navigates her way through medical school, friendship and love.''''The pilot will be written by Andrew Kreisberg ("The Simpsons"). Kelley will serve as an executive producer with Jonathan Pontell, who will direct the pilot.moreless