Simplism's Leather Sleeve Case for iPad 2 ($30) is about as simple as cases come. It is composed of two flat leather halves, sewn together with an opening on one of the short ends. There is just enough clearance for an unadorned iPad 2; the fit is very tight. The only real distinguishing factor is a pocket that runs all the way across the sleeve. As Leather Sleeve Case is so form-fitting, you can only fit small accessories such as paper, pens, or…