Strangely enough, the internet is a great place to find music. The most obvious candidates would have to be mp3s, and streaming audio.
Music companies fear the huge levels of pirate trade on the internet, usually for free or barter.
The public are finding that their workstations make great personal Juke-boxes. You can store more than 12 hours of mp3 music on a normal CD-ROM, and lterally weeks worth on a modern hard drive. My mp3 Playlist I've been making and collecting mp3s for about a year, mostly from my own CD collection as the quality of tracks downloaded from the 'net is often pretty crappy. My mp3 playlist is in danger of filling all my hard drives. You can download mp3s from here.