Thankyou Vla for this information.
Windows .NET Server Family build 3663 has been marked as Release Candidate 1 (RC1) and can be downloaded by testers now.
We'll have more information as it comes in.
Windows .NET Server includes all the functionality customers expect from a mission-critical Windows server operating system, such as security, reliability, availability, and scalability. In addition, Microsoft has improved and extended the Windows server operating systems to enable your organization to experience the benefits of Microsoft .NET—software for connecting information, people, systems, and devices.
View: Introducing the Windows .NET Server Family
Download: Not a tester? Join the Windows .NET Server Customer Preview Program