Check this story from Wired out - TorrentFreak has introduced a Firefox add-on that places a “Download 4 Free” button on Amazon.com pages selling music.  This button provides a link to the leading The Pirate Bay torrent for that album, and I can personally say that it works very well.  While the website that originally launched the app, Pirates-of-the-Amazon.com, is a school project website that has removed the offending file due to legal threats from Amazon, the add-on is still available from TorrentFreak.  While it may not be all that useful, this IS slick, and quite funny.  Try it out.