Apple clearly considers its new App Store-based distribution model one of the biggest advances in Lion, and to the company's credit, we found the whole thing to be quite painless. But physical media devotees needn't worry too much -- the company quietly announced at launch that the latest version of OS X will also be available on a USB key, for the lofty price of $69 -- which, incidentally, still requires Snow Leopard, unlike what has been previously reportedly. Word hit today that the company has finally issued the flash drive version of the software, informati