Two things I neglected to mention about MagnaTune.com the other day because I was too busy listening to free samples:

When you buy downloadable files, you get to choose how much to pay, from $5 to $18. 50% goes to the artist directly, and you're encouraged to pay generously. I'd bet money that nobody pays $5.

When you buy downloadable files, you are explicitly granted a license and encouraged to share the downloaded files with 3 friends.