Apple has released OS X Mountain Lion, the latest version of the company’s desktop operating system. Users can purchase Mountain Lion from the Mac App Store for $19.99 with upgrade paths available for both Snow Leopard and Lion. The Web is buzzing with reviews of the OS; some notable examples are The Verge’s review and MacStories massive 30,000 word ebook. (MacStories’ book costs $6.99, and 30 percent of proceeds go to the American Cancer Society.) [Source: The Verge / MacStories]