Senuti only lets you transfer 1000 songs on the free trial, then you have to buy a license to use it more. I used a program called iPod View for the rest. Both were slightly glitchy, and I had to quit and re-open the applications a couple of times after every couple of hundred tracks, but the job is done now, and it works fine.

Now, does anyone know if I can pull the photos from my 2005-ish 30GB iPod Photo?