Windows Server 2008 R2 beta is now available for download.
Yes, it is official Windows 2008 R2 is available on Connect, TechNet subscribers have access and it will be available generally on the Windows 2008 R2 landing page http://www.microsoft.com/windowsserver2008/en/us/r2.aspx tomorrow (9th January) from what I understand. I also just noticed that Hyper-V Server 2008 R2 beta has been posted! If you are having trouble finding Hyper-V Server 2008 R2 then look under Applications rather than Operating Systems.
Patrick Lownds