I have just found a great list of 100 websites that contain educational MP3’s and podcasts that you can download to you iPod. Some of it is commercial, but most of it is available for free.
Some of the material includes:
- Vocab builders
- City Guides
- Educational games
- University classes (eg Stanford, MIT, Yale)
So now you have no excuse for not learning on the go.
(There is also a section on creating your own podcasts, podcasting software etc.)