Even though I am a few days late with it I guess I should add that Sharepod may not transfer any DRM-encoded songs that were purchased from the Itunes store and synched to an Ipod back to the computer. However, you can download Itunes again on your computer, then go to the Itunes store and in the quick links list on the right side of the page there is a new function called "Purchased". You can click there and re-download songs that you previously purchased from the Itunes store, then Itunes will automatically build a "purchased" playlist in your library where it will store the purchased songs. Then you can transfer them to any playlist you like.
I recently had a problem with Itunes cutting off the last 30 to 45 seconds of some of the songs in my library. All of the songs that were cut short were songs I had purchased from the Itunes store, some I had bought 4 or 5 years ago. It was a total of about 60 songs that had the problem, and try as I might I was never able to fix them using Itunes and re-importing my library. I tried several fixes I read about online, nothing worked. I did use the "purchased" function at the Itunes store and restored about half of the songs back to normal operation. The rest I had to dig into my CD's and re-import back to Itunes. I learned long ago when I first started using Itunes that I need to always make a backup CD of any song I buy or import from borrowed CD's. I get a lot of free music from CD's I check out from the local libraries. The hard part of fixing the chopped-off songs was sifting through over 125 playlists to find the songs that were chopped off at the end. The whole project took me several hours a night for the last two nights but the good thing about it is I found some songs that I had purchased from Itunes several years ago but had deleted from one Ipod synch or another. It is good to have those songs back in my library again. The "purchased" playlist will also have any DRM-encoded songs you may have bought a few years ago listed too, but they should still play on your Itunes/Ipod without any problems.