AB Sutton has introduced its new Simple Slip case for the Apple iPad. Sporting a vertical sleeve-like design, the Simple Slip features a leather exterior, silk or cotton lining over grey wool felt padding, leather- or lining-matching stitching and trim, and the ability to be folded on itself for use as a typing stand. AB Sutton’s Simple Slip for iPad is available in a wide range of colors and linings, and sells for $128; monogrammed versions…