Thanks anon for providing these screenshots of build 3714 which has leaked onto the Internet. This had originally been called RC2 but now people think this is more likely a Pre-RC2 build before a release to testers most likely on Friday.
This build is a continuation of the cleaning up of the code and implementation of the newer "Windows .NET Server 2003"
If you missed the release notes and "whatsnew" documentation we posted a couple of days ago here they are again.