Targus has rolled out its latest cases for the Apple iPad. The Z-Case is a hard-shell case with a leather exterior, soft colored lining, and a magnetic closure; it sells for $55. Made from smooth oil-tanned leather, the Targus Hughes Leather Portfolio Sleeve features a soft interior twill lining and a magnetic closure, and is priced at $60. The Truss is a folio-style leather case featuring a soft interior lining and the ability to double as a stand…