Whatever other arguments there are on either side of the music piracy debate, I was always suspicious of those who claimed that online file-sharing would be a threat to sales. There are reasonable arguments that it might, but there are reasonable arguments on the other side as well–as the article mentions, it is quite possible that file-sharing exposes people to new music they would not have heard before, motivating them to buy the album.
Either way, couldn’t we all just come to some happy compromise? The Yahoo/Launch music service offers customizable online radio stations, the free version being ad-based. I’d be quite happy if someone offered something like an online jukebox where you actually got to pick which songs to play when. Artists could be paid for how often their songs were played, and the whole setup could be supported by advertising.
But enough silly idealizing — you can just download Kazaa Lite and set all of your [legal, of course] downloads to do not share;)