You could try
exPod to get your music off the iPod first. If that does not work, you could use a
network connection, LAN or Wireless LAN. If that does not work, you could use an
external HDD formatted for Windows (NTFS), as Mac OS X can at least read that. After that you can reformat the HDD for your uses, HFS+ (Mac OS Extended) for using it with Mac OS X only, FAT32 for using it with Windows and Mac OS X, but the maximum file size is limited to 4GB.
You can also use MRoogle to find dozens of similar threads.