MiniKey, which comes only in black, starts with a simple plastic shell at its base, fully exposing the top and bottom edges. While we don’t like shell-style cases, they’re pretty much the norm when it comes to keyboard-equipped options. At 0.66” thick, it just more than doubles the size of the iPhone 5. The keyboard is on rails, and easily slides in and out from the left side. It’s the same width as the device in landscape…