It's been a long, long wait for Vizio's ultrawidescreen LCD TV to show its face: the company was promising such sets starting around this time last year that ultimately missed the October and subsequent March targets. Vizio is one to eventually make good on a promise, though, and has just started shipping the first XVT series CinemaWide set. The lone 58-inch model's focus remains on that 2560 x 1080p scree