Amazon:

Amazon.com today announced the availability of "Kindle for PC," the free application that lets readers around the world enjoy Kindle books on their personal computers (PC). The U.S. Kindle Store currently offers more than 360,000 books, including New Releases and 101 of 112 New York Times Bestsellers, which are typically $9.99 or less. The Kindle Store is the only place to find some of today’s most popular books in digital format. Kindle books can now be read on the Kindle, Kindle DX, iPhone, iPod touch and PC. Kindle for PC is now available as a free download to readers in over 100 countries at www.amazon.com/KindleforPC.

Kindle for PC features Amazon’s Whispersync technology that automatically saves and synchronizes bookmarks and last page read across devices. Whether you read Kindle books on a Kindle, Kindle DX, or one of the free Kindle applications, you can always have your reading with you and never lose your place. With Kindle for PC, you can read some on your PC, read some on your Kindle, and always pick up right where you left off. Whispersync helped make the Kindle for iPhone application the most popular books app in the Apple App Store.

Update: I love when people don't get the market. This morning, Wired wrongly guesses that Amazon is somehow "hinting at a future color Kindle" because a screenshot of the PC Kindle on its site includes a color illustration. Um. The Kindle iPhone app has supported color ebooks for months now, something I discussed a while back on the Windows Weekly podcast. I noticed this because a book I was reading at the time had color photographs, which can (and always could) be seen in color only on the iPhone app. So this isn't new. Thanks for playing, though. :)