Amtrak officials no longer pretend that Acela is the futurethey've vowed not to buy any more of the trainsbut they insist that they still know the solution to passengers' woes: more money from Washington. Mr. Vranich made the conversion from spokesman to scourge, arguing in books titled 'Derailed' and 'End of the Line' that train service would never improve as long as Amtrak had a