Sony tried to convince us that its VAIO P was a pocketable computer, so we quite naturally pointed, laughed and mocked. It seems only fair, therefore, to give Samsung the same treatment when it tries to sell us on the idea that we'd be perfectly comfortable stashing its Galaxy Tab slate in the back pocket of our denims. Listen, the only way we're ever going to put hundreds of dollars' worth of money into our rear pocket is in note form, protected by our J