I just got an Ipod look-alike to take on a trip and I've been loading it with music from my computer. If your'e looking for a source of folk, celtic, blues, etc., you can join for about $30 annually and they have member downloads free and you can buy tracks for $.99.

There are established artists and lots of new groups that offer tracks just to get noticed.

http://www.efolkmusic.org

I'm sure I got more than $30 free music the first year and I'm now in my second year. I'm partial to celtic and folk myself.

Tom