That's the question that's out there once more, and rumours have it that Apple could - finally - make it offcial today at the Macworld conference in San Francisco that they will enter the mobile phone business. A US mobile operator ready to enter could be Cingular (AT&T owned). While Apple does not comment yet, it is clear that they have to come out with something new to the iPod if they don't want to experience similar troubles to Motorola who so far have failed to find a successor to their RAZR clamshell phone success.