I freep on my Blackberry. Very quickly and easily in fact. :o) I’m at a Dr. Appt now freeping. I’m addicted to my Crackberry.
But no, if you have no WiFi, and no computer, I don't see an iPod doing much for you. I have close to 3K songs on my iPhone. I couldn't imagine putting that much music on it via iTunes, and you couldn't do that without WiFi or 3G. I did it the old fashioned way. I ripped my CD's to HDD and then transfered to iPhone via the laptop.
I think I've bought exactly one song via iTunes. And maybe two applications. All the other were free ones.