The Windows Cache Extension for PHP (WinCache) 1.0 is now RTW – open sourced on the PECL extension library under BSD with the source code hosted and maintained on http://pecl.php.net/packages/wincache/ and the documentation hosted on php.net: http://us.php.net/wincache/. WinCache significantly accelerates the performance of PHP applications on Windows without requiring code changes by the application.

Some of the blogs that mention this announcement are -

http://www.iis-aid.com/articles/performance_testing/wincache_performance_live_site

http://blog.calevans.com/2009/09/06/wincache/

http://forums.iis.net/t/1162243.aspx

Other InterOp stories and links that might be of interest to you are:

Windows Azure SDK for Java™
The Windows Azure SDK for Java is an open source project that gives Java developers a speed dial to leverage the Windows Azure platform.

Windows Azure SDK for PHP
The Windows Azure SDK for PHP is an open source project that enables PHP developers to take advantage of the Windows Azure platform.

Windows Azure Tools for Eclipse
The Windows Azure Tools for Eclipse plug-in offers PHP developers a series of wizards and utilities allowing to write, debug, configure and deploy PHP applications to Windows Azure. The plug-in bundles the existing Windows Azure SDK for PHP into the Eclipse PHP project. The plug-in includes also a Window Azure storage explorer that allows developers to browse data contained into the Windows Azure tables, blobs or queues.

.NET Services SDK for Java™ Developers
This an interoperable open source SDK - set of libraries, tools, prescriptive patterns & guidance & real world sample applications that will enhance productivity for Java developers with Window Azure service bus and access control.

Ruby SDK for .NET Services
.NET Services for Ruby is an open source SDK that helps Ruby programs communicate with developers with Window Azure service bus and access control using plain HTTP.

.NET Services SDK for PHP Developers
This an interoperable open source SDK that enhances productivity for PHP developers with Window Azure service bus and access control. This is an interesting location to lookout if you are an PHP developer.

Comments welcome !!!