Varying in innovation and polish from case to case, the new lineup of Sena-branded leather cases has arrived for the iPad. Most interesting in the bunch is Collega ($150), a pricey evolution of the purse that adds a large exterior pocket and two retractable straps to a zippered iPad sleeve. It can be carried under the arm or in the hand as the user prefers; Sena packages it with a cloth carrying bag and sells it in four colors. Next up is Folio ($100),…
