I've heard much recently about Yahoo! Music, Napster and Rhapsody. The first problem is that Yahoo and Rhapsody took a dislike of my choice of living and shut me out for no reason that I can find. I can't find the info about Napster, but I've a bad feeling about it.
The second problem is that they simply do no carry the mousic that I want. What I want is several CDs of filk music, specifially, those cds. All three services claim to carry over million songs, but that doesn't help much. :-(
As far as I can tell, the above link is the only place where I can get these CDs, which cost quite a bit, and I can't find anything about international shipping. Beyond that, I don't really have anything to do with CDs, I would rip them and play them on my computer/player, never as CDs.
One thing to note, it's awesome to hear filk music when you read the relevant book.