We've been working on it since we RTW'ed v1.0 late last year and v1.1 is now "official."  V1.1 contains minor bug fixes and, most importantly, official support for Windows 2000.  Internally, the team wanted this in v1.0, but there was a snag or two along the way.  Needless to say, the community push back on this issue was amazing and definitely had a role in getting this release approved.

Here is the official release:

Microsoft plans to release Kernel-Mode Driver Framework (KMDF) 1.1 for Microsoft® Windows Server™ 2003, Windows® XP and Windows 2000 in the second quarter of 2006.

In December 2005 when KMDF 1.0 was released, Microsoft indicated that KMDF support for Windows 2000 would not be available, because the Windows 2000 product family has transitioned from Mainstream Support to the Extended Support phase. However, based on feedback from the Windows driver development community, Microsoft now plans to release a version of KMDF that will install and run on Windows 2000, subject to the current status of Extended Support provisions. Under this status, Microsoft will not provide fixes for any KMDF defects where the fix is applicable only to Windows 2000.

For more information about the Microsoft Support Lifecycle, see http://support.microsoft.com/default.aspx?pr=lifecycle. Specific information about Extended Support for Windows 2000 is available here.