As said above, the iPod uses a file format unreadable to windows without a 3rd party software.
They want to:
1. Lock you to iTunes
2. Disable any kind of 2 way Sync(so you can go to a friends and dump your songs on that computer). I am not joking even in the iPod the songs are in different locations and labeled without actual names.
3. Take over the world.
I used a software package(i forget the name) to access a first gen iPod touch to get files off. After that dropping the folder(because all files names are messed up) into iTunes imported and renamed it back to normal. Was a pain to be honest. With my Zen, i just copy and paste.