I bet that behavioral economists get rather excited when they see pay-what-you-want offers going viral. Assuming the seller is collecting some basic demographic detail, the resulting statistics might deliver some interesting insights into the relative altruism (or discretionary cash reserves) of different sorts of folks.
The Humble Bundle team (responsible for the Humble Indie gaming bundles that we've covered before) is running a Humble Music bundle, accessible to all sorts of music fans. Featured artists include Jonathan Coulton,
