Kroo Apple iPod Video LCD Screen Protector Pack (3pcs) - Clearance Sale
You know when you buy a watch or a new cell phone and it comes with a cheap piece of plastic overlaying the screen to protect it in shipping?  Well, this is basically the same thing - the difference being that the factory screen overlay is applied in a dust free environment by a machine designed to do it, whereas you will be trying to apply this with your fingers in a room in your house or apartment.  Best bet: if you want a piece of plastic on your screen, leave the factory one on.