"The broad set of interoperability principles it is announcing today will apply to the following products (including future versions): Windows Vista (including

"The broad set of interoperability principles it is announcing today will apply to the following products (including future versions): Windows Vista (including the .NET Framework), Windows Server 2008, SQL Server 2008, Office 2007, Exchange Server 2007, and Office SharePoint Server 2007." In other words (if I'm reading this right), it doesn't apply to at least of 99% of Microsoft's installed base.