There has just been an announcement detailed on the Microsoft PressPass and also the http://port25.technet.com/ sites, providing details on the Technical Collaboration between Microsoft and Zend Technologies.
This collaboration, announced at the Zend/PHP Conference in San Jose, aims to enhance the experience of running the PHP scripting language on not only current generation Windows Server, but also 'Longhorn' Server, released next year. The result of this collaboration really will allow customers to utilise the power of the Windows Server Platform, through richer functionality, better integration and hence, improved performance and increased reliability.
We see there being 3 key areas of collaboration (taken from the press release):
You can read the full press release over on Microsoft PressPass, where you will also find information on a Bill Hilf keynote, alongside Zeev Suraski (Zend) and Andi Gutmans (CTO & Founder Zend), demonstrating the core initial work on PHP for Windows.