The only significant change to the experimental section in the Kindle 2 was the addition of a text-to-speech capability that allowed the Kindle to read content to its users in one of two synthesized voices. Following an extended outcry from some in the publishing business, however, Amazon has backed down and will allow publishers to retain control over whether to expose their texts to this capability
Remember the lawsuit against google when Buzz came out? I am pretty sure that's what this is about. Interesting that they think someone facebook is behind it.