An Internet-based music label
What if there was an non-profit organization specifically dedicated to distributing artists' music in return for voluntary donations? A way to organize the "giving in return" for the enjoyment of free music? Imagine a site where you could download anything you want from your favorite artists, and find a small link to give back to them. The site takes just enough for maintenance/server costs, and gives the rest directly to the artists that have signed with them. A small tag could be added to the music file info with the name of the distributor, so that people getting the files second-hand could be referred back to the label's site if they so choose.
From the artist's perspective, they could take in money from fans without the overhead of CD printing, advertising, agents, and all the other expenses of physical distribution. In the current system, the artist normally sees only a small fraction of the royalties from their music - what if they got nearly all of it? In addition to that, knowing that the money was given freely by their fans, as opposed to being forced out of them. This could lead to a revolution in the fan/artist relationship.
I don't personally have the connections to make something like this happen, but I know that among the TED community, there are plenty of people well-networked and able to envision something like this. If can you take this idea and can make it happen, please do!