Windows Server 2008 R2 build 6608

Windows Server 2008 R2 build 6608 is an unleaked build of Windows Server 2008 R2. Only a single image from BPuhl of the login screen has been leaked. This build uses the "Windows Server 7" branding which was also used in build 6801. The original post has since been deleted, but some info of the post has been archived on other news sites. This build is also mentioned in build 6801's setup. In particular, it notes that you can only upgrade if running build 6608 or higher.