TV TITAN Oprah Winfrey becomes a publishing power, as the cookbook In the Kitchen With Rosie, by Winfrey’s chef, Rosie Daley, marks its fourth week at the top of the best-seller list. In two years, Winfrey will launch a book club that will make best-sellers of 16 books. FILMGOERS rush to Speed, the hit bomb-on-a-bus thriller starring Keanu Reeves and Sandra Bullock (left). The 1997 sequel, set on a ship, would sink at the box office. SMOOTH CROONERS All-4-One spend a sixth week atop the pop charts with ”I Swear,” the single that helps their first album go multi-platinum. They will issue two more albums, and perform on another four, including 1996’s Space Jam soundtrack. AND IN THE NEWS, huge payouts deplete the coffers of Lloyd’s of London, famous insurer of such offbeat assets as Mary Hart’s legs (for $2 million).