Amazon.com unveiled an international version of its popular Kindle device that will be powered by AT&T Mobility and its international roaming partners, which Amazon said will allow users to download content in more than 100 countries. Amazon also cut $40 off the price of its U.S. version, which runs on Sprint Nextel's network, from $299 down to $259. The new international version--which is physically the same as the U.S. version--will cost $279 and will start shipping Oct. 19. Article