The newest version of itunes will let you move stuff from the iPod to the computer. A problem that you might run into though is that the first time you connect the iPod after installing iTunes, it might try to autosync which will blank the iPod. If you're lucky it will ask you first but it is a flaky program IMO.
I have a program call Anapod ($25) that I got from http://www.redchairsoftware.com that provides a nice click and drag interface within windows explorer.