Along with a number of its other cases, Speck has made minor alterations to its PixelSkin ($30) and PixelSkin HD ($35) to fit the iPhone 5. The first is a soft rubber case that securely wraps around the device, covered in a pixelated pattern. On top of providing body and button protection, the case has a small lip around the glass display. And as before, the HD version is made of a slightly more rigid material with much smaller boxes on the back,…