...more recent posts
Somebody I haven't seen before in the small group over at HackthePlanet has posted a very reasonable sounding way to set up MP3's to allow people to easily send money (voluntarily) to the tracks artist. Very convining scenario. I doubt we'll see this adopted any time soon, but I do think it would work. (Slightly technical, as usual for HTP, assumes you know what public key encryption is, ect...)