On March 13th, 2008, Microsoft announced a roadmap for the Open XML SDK. The Open XML SDK, originally announced at TechEd in June 2007, is designed to help developers create client and server solutions that take advantage of the Ecma Office Open XML Formats (ECMA-376).
The Open XML API will be released in two versions:
Customers and partners interested in learning more should visit http://openxmldeveloper.org/archive/2008/03/13/OpenXMLSDK.aspx
Additional information: