iTunes allows you to copy MP3s from your computer to your iPod, and do everything but copy those MP3s back to your computer. But now with iPod Viewer, you can do just that! Just launch the application, import the songs from your iPod, select the songs you want to copy, choose where you want to copy the songs to, and transfer the files. That's it!
Its ok needs to improve on copying all the information, better than other rips from ipod to itunes that cnet has viewed and its free maybe apple can do something like this . so far apple has not I would like to update my ipod using my itunes library but can't without erasing my ipod and the music and pod casts and videos on it. that I purchased through the apple store.