According to this new post on the JSLabs blog today, Microsoft has made another push in the PHP world with the release of a version of FastCGI for IIS.
The FastCGI component is part of the collaboration between Microsoft and Zend to improve performance and stability of PHP on the Windows platform. This effort aims to help PHP developers achieve improved performance on the Windows platform by leveraging the new IIS FastCGI feature together with Zend's on-going work to improve the PHP engine on Windows.
the module can be used with Windows Vista, IIS including IIS 6.0 in Windows 2003 Server and IIS 5.1 in Windows XP. Justin also includes some simple installation instructions (three to be exact) to get you up and running.