Windows 7 has passed the rigorous testing required to be Common Criteria certified, along with Windows Server 2008 R2, and SQL Server 2008 SP2. The certification is a major milestone because it qualifies the Microsoft products for use by many US government agencies.
A Microsoft FutureFed blog post explains, “Common Criteria certification is an international standard for ensuring that IT products conform to stringent security requirements, is recognized by the 26 member nations of the CCRA, and used in procurement requirements by governments around the world. In particular, Common Criteria evaluation of operating systems and database management systems (DBMS) is a mandatory procurement requirement for U.S. defense and national security customers.”
That should open some doors and help Windows 7 leave Windows XP in the dust.