We are excited to announce that we’ve added a new gallery image for Windows Server 2012 R2 Preview in Windows Azure Platform Image Gallery.Now, you have the opportunity to preview all the latest features on Windows Server 2012 R2 by provisioning a VM using the preview image. Note that the support for this image will be provided through the following channels during the preview time period. The official support for this image will be announced once Windows Server 2012 R2 released to GA (General Availability).
Windows Server 2012 R2 Preview – General
http://social.technet.microsoft.com/Forums/en-US/windowsserverpreview
Windows Server 2012 R2 Preview – Setup
http://social.technet.microsoft.com/Forums/en-US/winserver2012r2previewsetup
Windows Server 2012 R2 Essentials Preview
http://social.technet.microsoft.com/Forums/en-US/2012R2EssentialsPreview