You can sign up now to receive free trial software for Windows .NET Server Release Candidate 1 (RC1)?via CD or download. Read about the Customer Preview Program (CPP), available in English only, then use the links on the right to make your choice.
http://www.microsoft.com/windows.netserver/preview/default.mspx
http://www.microsoft.com/windows.netserver/preview/default.mspx