Not that NVIDIA really needs Microsoft to give the ole thumbs-up here, but having that seal of approval may convince some currently wary manufacturers to jump in and support the Ion platform over one of those perfectly fine alternatives. As with so many other devices in the world, NVIDIA's Ion platform is now Certified for Windows Vista, meaning that PC users could one day experience all the joys of the aforesaid OS on Ion-based rigs as low as $299. We're told that such machines cou