New Radiohead

Their new album, In Rainbows, is superb. And you can download it for whatever you think it's worth. Some economist is going to have a field day with this, but I wonder what effect having to register your name, address, mobile number, etc will have on what people pay? I found it to be a little guilt-inducing. Not saying whether or not that resulted in my paying 'fair price' or not. After all, every price is a fair price in this situation.