Jon Roskill announced that Windows 8 is available to Microsoft partners for internal usage with Silver or Gold competencies through the Digital Distribution Center. You will find it on the banner page:
Windows Server 2012 has not been added. We’re left to guess that it won’t be available until at/after Sept 4th. Extremely disappointing because businesses are more likely to deploy Windows Server 2012 before Windows 8 – it’s the server that enables the business features of the desktop.
August 20th is the day for MAP (Microsoft Action Pack) subscribers for Windows 8.