As an internet user and Radiohead fan, John was happy to hear that the band would release their latest album in mp3 format for download in their webpage on a you-set-the-price basis – even for free if you decide not to pay. He was determined to visit the page as soon as the album was released and download it; he would even give some compensation for it. However, the release date came and John was away from home those days, so he could not download it. Then he forgot, and some days later, while searching for some music torrents to download, he thought of it again… only to write “Radiohead – In Rainbows” in the search box in the end.
John’s behaviour is only an example made up to illustrate just how difficult a road the record companies and artists have ahead of them in order to be able to monetise music downloads through the internet – to obtain profit from digital music. The future of file sharing P2P networks has been a hot topic, open to multiple visions, for a long time now (see for instance these visions from 2001-02). I honestly do not know whether one day illegal content sharing will be put to an end, or on the contrary, contents will become essentially free as P2P networks eat out on legal distribution methods. There are a few factors to think the outcome will be either way, let me just concentrate on two.
I honestly believe that most people, when confonted with two equivalent ways of doing something, one legal and one illegal, would choose the legal way. Even if the legal way was slightly less convenient than the illegal one, people would still choose to be legal, be it because of deep ethical convictions or just to avoid getting into trouble. So there is hope.
However time is a more important factor than is usually regarded. It is the time that has to go by before legal methods are as convenient and generally widespread as illegal ones (iTunes is just one tiny step), plus the time advantage that P2P software have over the new legal methods to come. You just cannot convince millions of users to stop using a service that they have learned, become used to, and which takes up an important part of their time online, and get them to learn a myriad of new, different ways of doing essentially the same thing, only more expensive. Legality is a small weight on one scale of the balance, it will need many more to be heaviest. Users are lazy and have huge inertia – they have invested a lot of time and effort to master Napster, then Kazaa, then Bit Torrent, and something really good will need to come to push them to learn again. In the meantime, they will continue to resort to the P2P search box.

It is a few months now since Google 

Wikipedia

Much can be said about two of the most successful so-called