Speck ToughSkin Silicone Case Skin for Apple iPod Classic 80GB, 120GB MP3 Players - Color Black
iPods are slippery little devils and tend to jump out of your hand.  This is an outstanding product that protects what needs protecting. I often have to slip it out of the toughskin to place it in a speaker receiver, and it has held up for years.  Don't lose the protective cover for the screen, it has a non-slip edge to keep it in place and protecting the screen.