Ever since the Tablet PC came out last fall, there have been rumors that Apple would try and one-up the PC world and come out with its own tablet-style computer, and now TaiwanHighTech.com is reporting that Apple has contracted Quanta to build a 15-inch tablet computer. Given how many graphic designers and other creative-types gravitate towards Macs, a Tablet Mac seems like a natural fit for Apple. And the unexpectedly high sales of the Tablet PC probably hasn"t escaped their attention either.