Microsoft has now made available the download links for people wanting to try out Windows Server 2012 R2 and the new features that were announced at TechEd North America a few weeks back.
There are four different versions available depending on your need. It is worth noting that these versions will expire on January 15, 2014.
Also available today are the preview versions of Microsoft’s System Centre Suite 2012 R2 & SQL Server 2014.
All the download links are available here >> http://technet.microsoft.com/en-au/evalcenter/dn205292.aspx?CR_CC=200142594