Amazon may be giving out Kindle free to Amazon Prime users. As I have indicated before, Prime members spend 130% more than the non-Prime members so this ties well with the plan of increasing value of Prime and retaining/growing Prime members.
In October 2009 John Walkenbach noticed that the price of the Kindle was falling at a consistent rate, lowering almost on a schedule. By June 2010, the rate was so unwavering that he could easily forecast the date at which the Kindle would be free: November 2011. Since then I've mentioned this forecast to all kinds of folks. In August, 2010 I had the chance to point it out to Jeff Bezos, CEO of Amazon. He merely smiled and said, "Oh, you noticed that!" And then smiled again.