In case you haven't heard,

In case you haven’t heard, let me glady announce the arrival of Apple’s iTunes Music Store, which launched today. It’s kind of amazing, that finally a reasonable company has focused on a way to download music for a fee in an interface that is friendly, elegant, and, mostly smart (see the new iTunes 4).
Now, I doubt that this is going to hurt most people trading MP3s, but for me, who finds trading in MP3s boring, unoriginal, and wholesomely illegal, this is a perfect service. I’m not pro-recording industry, who pay most of their artists a pittance; however, this seems to be a start of something very beautiful.