Please add support for .NET 4.0 Framework on Windows Core Server 2008 R2.
Until this is done, we have no choice but to not update to 4.0.
In http://social.msdn.microsoft.com/Forums/en/netfxsetup/thread/0cb922d1-b85e-43ba-b8ac-26400491480f, "Rabi Satter" states the reason for not supporting .NET 4.0 on Core server is "Only when a new version of Server Core is released can a new version of .NET be included.". This is unacceptable. I would have expected a more end user friendly response from MS instead of a "It's our way or no way" response.