As reported by Crunch Gear on July 15, 2008 the next version of the Kindle will likely be released in October 2008, in time for the holiday season.
This probably means you shouldn’t buy a Kindle now. Unless the price drops precipitously. I have no sources to indicate the price of the current model will drop, but it would be hard for me to believe that it won’t. Unless supplies are dwindling anyway. We will have to wait and see.

