What makes this such a sticky issue is that without DRM, sharing would progress even further, keeping the artist from making even a fraction of what they are making right now. The few DRM songs that I have I don't share, because I can't, and I'm not authorizing everyone I know (not that I could). In this instance, it's doing what it is supposed to be doing. The problem is that DRM eventually just makes it difficult for people who spend the money, buy the song, and then want to use it however they see fit, within their legal rights, but can't. That goes for nearly any copy protection implementation.
It sucks both ways, and either solution is cause for concern for both parties. Leave DRM, people are pissed, sharing still occurs. Get rid of DRM, people are happy, sharing still occurs, and artists now have to get a second (or third) job.
Of course DRM-free music is available at any brick and mortar store (read CD's).