Recently Microsoft has announced a set of broad-reaching changes to its technology and business practices to increase the openness of its products and drive greater interoperability, opportunity, and choice. What Microsoft is providing is access through open connections to its high-volume products – Windows Vista (including the .NET Framework), Windows Server 2008, SQL Server 2008, Office 2007, Exchange Server 2007, and Office SharePointServer 2007 – so that software developers, business partners and competitors can better interact with these Microsoft products or invent new solutions for customers.

As a developer you get full access to the Open Protocol Specifications in the MSDN Library.