Apple 3rd Generation iPod Nano 4gb 8gb Video Premium Aluminum Carrying Case with LCD Screen Protector Shield - 5 Color Choices (MP3 Player NOT Included)
Upside: The case does a terrific job of protecting my nano, even comes with a screen protector,fun colors, lanyard is super handy...downside case prevents the input device for my car's aux. jack  from going all the way in, this little unfortunate detail makes for music interruptions while driving because the input jack won't stay in the nano!  I like the little case, the convenience of the lanyard, but disappointed in the 'jack' issue, still think it's a good buy.