Here's my latest example of how peer-to-peer file sharing could really help music companies if they played their cards right, which they almost never do.
A few hours ago I heard the last thirty seconds of a song on the radio. I liked it, and wanted to find out who it was. A quick search with Google and the Gnutella network yielded Norah Jones's "Don't Know Why." A lovely song. I'll probably buy the album.
It's been a long time since I heard and liked a song and wanted to buy it without being assaulted by videos and photos and fawning articles and so on first. I just liked the song and the performance. Had I seen Jones's album cover first, I never would have guessed she was a languid jazz singer, or that I might have appreciated her music. (For that matter, I'm not fond of most languid jazz singers.)