Windoz free and eazy:
-attach ipod, quit itunes
-browse to ipod in my computer/control/music/copy these folders to your compy (need to display hidden folders in explorer)
-highlight all copied folder on your compy, right click and change properties so they aren't hidden
-itunes, add folders with the option to let itunes manage your music and it will put stuff in your library w/ names and all
You can find this info online in more detail....
Winamp can also pull music off your ipod
...of course, assuming you own all this music and all that