AV TV USB Video Cable for iPhone 3G 3GS iPod Touch Nano
This item does not work.  Apple continues to change their firmware to prevent 3rd party items from working with the iphone.  If you plug this into the iphone you get a message saying that it is not suitable for the iphone, despite the assertion that the item is compatible.   If you need this you probably have to spend twice as much and buy the cable from the apple store.