I got an email today announcing a Humble Music Bundle, and thought that people might be interested.
If you've never seen a Humble Bundle, it's a "pay what you want" bundle, and you can specify how your payment is distributed.
There will be some content that is available only if you pay above the average price.
From past game bundles that have been available, they usually add additional content at around the halfway point, which you still get if you purchase before then. But this is the first music bundle, so I don't know if they'll do that.
Anyways, check it out.