I don’t especially like the silver back as it is slippy and impossible to keep scratch free by all accounts so I took the rather presumptuous precaution of ordering up a case in advance…ahem. I like those matte style non-slippy backs so ordered the Incipio black Feather case as it fits the bill and is really slim. It adds virtually no bulk to the iPod and feels good in the hand. I got it from here. As the iPod is so thin and the case so discrete I can leave it on all the time.
It comes with two screen protectors and a cleaning cloth as a bonus.