Amazon on Tuesday said that the Kindle for PC app is now available. The app allows you to read your Kindle books on your PC.
The move (statement, download) illustrates the gradual move to put Kindle content on more devices. In 2010, the availability of e-books on multiple devices is likely to be a key battleground. And the Kindle, which is less open than rivals from Sony and Barnes & Noble's nook, could be vulnerable since much of the industry is gravitating toward open standards such as ePub.
Amazon's bet: You're not going to sweat being tethered to its Kindle format if you can read your books on multiple devices. Kindle content is now available on your PC and iPhone. Like the iPhone app, Amazon's Kindle for PC synchs with your Kindle via its Whispersync technology. Look for Amazon to put Kindle content on more devices as it throws jabs at rivals.