chadwick writes "It seemed like a sure thing: the iPod mobile phone. What could be more irresistible than a device combining the digital-music prowess of Apple Computer (AAPL) with the wireless expertise of Motorola (MOT)? Motorola sent its buzz machinery into overdrive in January when it leaked word that the product would debut at a cellular-industry conference in New Orleans in mid-March. Well, hold the phone. At the New Orleans confab, a frustrated Edward Zander, Motorola's chief executive, stood before a roomful of analysts and reporters and said the handset's debut would have to wait. "