Microsoft might not breathe a single word on the next iteration of the Windows client and server platforms for the general public, but the company’s silence should not be mistaken for inactivity. While the software giant is keeping down to a minimum leaks on the development of Windows 8 client and Windows 8 Server, the company is indeed hard at work on the successors of Windows 7 and Windows Server 2008 R2. And while the company is keeping mum on Windows 8, it is already developing technical documentation for the US Department of Justice.

Robert Muglia, the president for Microsoft's Server and Tools Business, is still at the helm of the documentation effort that the Redmond company needs to perform per the settlement it reached with DOJ in 2001. The software giant has continued to make available technical content through the Microsoft Communications Protocol Program (“MCPP”) to third-parties that want to leverage the protocols in order to build interoperability with Microsoft’s solution and their products. Part of the technical content is related to Windows 8 and Windows 8 Server, although in all fairness, the DOJ doesn’t refer to the operating systems under these monikers.

Source -
Windows 8 Technical Documentation in the Works - For US antitrust regulators - Softpedia

Another nice find....