Our interest in sleeve-style cases for iPods and iPhones remains at an all-time low, but SwitchEasy's new Duo for iPhone 4 ($30) is at least a little different from the pack -- a brown, black, or white "real leather" design that allows you to insert the iPhone 4 into either its top or bottom, with mirror-image sides that each have a small metallic SwitchEasy logo in one corner. While the value of being able to insert a device into either side of a…
