eWeek posted a news story that Microsoft will release Windows Server 2008 RC1 later this month
>> Microsoft to Deliver Windows Server 2008 RC1 This Month
The first Community Technology Preview of Windows Server Virtualization, code-named Viridian, will be released at the same time, Larry Orecklin, Microsoft's general manager of marketing for System Center, said at a media event Sept. 10.
>> Microsoft to Deliver Windows Server 2008 RC1 This Month