The major issue facing the recording industry is how to get paid for all the music that is being downloaded, swapped and sold online. If you are using a legal music download service, there should be a fee per song, per month or per year to have continued access to the service.
In keeping with the spirit of the internet, most of the major legal music sites are offering free mp3 files just for signing up, for keeping your subscription current and in general obeying the rules of the site.