In addition to that three-piece armor case that chains your iPad to a hotel desk, Kensington quietly added three other products to its lineup -- a motley collection running the gamut from a universal tablet case to a doo-dad that vibrates when you're about to leave your iPhone at home. Starting with the doo-dad, BunjeeAir Power is a $100 accessory small enough to fit on a keychain, and pairs with a free iOS app and a special case (included in the bundle). If that sounds like a clumsy setup, keep in mind that Apple doesn't allow third-party accessories to lock the phone via Bluetooth, so Kensington worked a