First mention of a 10-inch BlackBerry PlayBook just this week has been quickly followed up by a sighting mentioned Friday. A reportedly credible traveller on a flight from Dallas to Toronto saw a device he said looked virtually identical to the seven-inch version but with a visibly better display. It was described to CrackBerry as unmistakable since it was using the same BlackBerry Tablet OS and was running Need For Speed, one of the bundled PlayBook games.