Just a comment here...
Many of the books with overdrive media are in Windows Media Player. I'm not sure if Ipods play those files.
Just want to warn you. I have a creative Zen and I'm extremely happy with mine. It plays mp3 files, or WMA without any problems.
I wanted to add that people have said that I must have the "patience of a saint" when I've worked on my scrappy quilts (1.5" inch strips). Not so. I enjoy listening to my books and sometimes I keep sewing because I'm enjoying the story so much! :)