Rumors of an Apple tablet in January gained fuel again today with a rumor elaborating on the company's supposed plans. A "plugged-in" contact for SAI says Apple has been asking some developers to prepare apps that could be demonstrated on a larger handheld device next month. It's not clear whether these are ports, though coders are being told that iPhone apps will work properly as long as they're not coded for a fixed size, clearly indicating a screen resolution higher than 480x320.