One update, however, is wholly new: Amazon has added a "Text to Speech" function that reads the e-book aloud through the use of special software.
This presents a significant challenge to the publishing industry. Audiobooks surpassed $1 billion in sales in 2007; e-book sales are just a small fraction of that. While the audio quality of the Kindle 2, judging from Amazon's promotional materials, is best described as serviceable, it's far better than the text-to-speech audio of just a few years ago. We expect this software to improve rapidly.
From the Author's guild. Read on, it's interesting about copyright too.