Pad & Quill, the Minneapolis-based manufacturer of outstanding handmade cases for a variety of Apple and Amazon devices, is offering TUAW readers a 15 percent discount on all orders this weekend. The cases are colorful, nicely designed, and lovingly constructed with top-notch materials. I reviewed the entire Pad & Quill line in January, and was particularly in love with the Cartella case for MacBook Air (11" and 13") and the beautiful Little Black Book for iP