Logitech just can't stop making keyboard cases for iPad minis, and its third set in six months includes the new Ultrathin Keyboard Folio, which melds familiar elements -- water-repellant materials, Bluetooth connectivity -- with a few novel ones. Namely, iOS shortcut keys for copying and pasting and a magnet system called SecureLock to keep your slate anchored. What the firm is claiming is its thinnest and lighte
