What are your thoughts on Performing Rights Organizations? Do you collect royalties, and if so, how does it interact with Creative Commons licensing?
Believe it or not, about half of my music income comes from iTunes (available when you sell CDs at CDBaby). I don't claim to understand that one. I do hear from a lot of people who say "I want to support your music, but I didn't want/need a physical copy, so I bought it on iTunes." And more and more, people are discovering my music without ever even seeing my website. One big vehicle is iLike, which is an iTunes sidebar plugin. You might be listening to Death Cab, and over on the right side, you'll see a "Hey, check out this similar song from Josh Woodward" link. It's one of the best promotional vehicles available to indie musicians, and is highly recommended.