Now you don't have to wait a year to deploy it in production ;) All right... it's not really breaking news. It was planned this way, and Iain McDonald (there he is):
has the scoop on why the "About Windows" screen in Windows Server 2008 shows as Service Pack 1. Explanation after the jump: http://blogs.msdn.com/iainmcdonald/archive/2008/02/15/windows-server-2008-is-called-sp1-adventures-in-doing-things-right.aspx