Simplism's new Leather Sleeve Case for iPad ($30) is an update to its case of the same name that was released roughly a year ago. This one fits all three iPads though, and has a few other differences too. The front pocket has been removed, but an elastic closure system has been added; the band wraps around a roughly cut circle of black material to keep the tablet in place. It's worth noting that Simplism uses the term "leather" pretty liberally here,…