Is Safari 6 for Windows dead?

It appears that way.

Allan

Why no Safari for Windows beyond version 5.1.7?

Apple's Steve Jobs first announced Windows PC support in Safari 3.0 at Macworld Expo in 2007. The primary goal of that new version was to push the adoption of modern, standards-based browsing by making Safari's WebKit browser widely available as an alternate to Microsoft's Internet Explorer and Mozilla's Firefox (originally Phoenix) browser built on the ashes of Netscape.

However, while adoption of Safari among PC users has been limited, Google's free Chrome browser, based on the same WebKit engine as Safari, has achieved wide distribution, virtually erasing the need for Apple to develop and support its own browser for Windows.

Additionally, Apple's subsequent success with iOS, paired with the nearly unanimous use of WebKit by other mobile platform vendors (including Nokia, RIM, Palm, Google and others) has effectively made WebKit the only significant mobile web browser engine.

By terminating support for the Windows platform, Apple can focus on the development of features unique to its own platforms, as represented by many of the unique features in Safari 6.0. Apple is still supporting continued, open development of WebKit on a variety of different platforms.

Downloads for other Windows software, including iTunes, QuickTime and Bonjour printer support, are still available and do not appear to have changed. Some Apple web pages, including the QuickTime page for Windows downloads, still link to "Safari for Mac + PC," but those links all now direct to information that only applies to Mac and iOS devices.

(Above quote is from a non-Apple source)