An open letter to sports columnist Jay Mariotti, who resigned from the Sun-Times and lashed out during a TV interview announcing that newspapers were dead: Dear Jay, What an ugly way to leave the Sun-Times. It does not speak well for you. Your timing was exquisite. You signed a new contract, waited until days after the newspaper had paid for your trip to Beijing at great cost, and then resigned with only an email. You saved your explanation for a local television station.