If you're a regular NPR podcast listener, you regularly hear the phrase: "Support for our podcast is provided by Audible.com." Their specialty is a massive store of books and audio media reports all as downloadable MP3s because really, does anyone get them on tape any more? Or even CD? Today Amazon announced that it purchased the online literary listening source for $300 million. The question is, will I be able to keep listening to This American Life for free?