Three brand new deployment labs, created by Johan Arwidmark, are now available on the TechNet Virtual Labs platform.
Creating a Windows 8.1 reference image
http://go.microsoft.com/?linkid=9845755
Deploying Windows 8.1 with MDT 2013 (Lite Touch)
http://go.microsoft.com/?linkid=9845757
Deploying Windows 8.1 with Configuration Manager 2012 R2 and MDT 2013 (Zero Touch)
http://go.microsoft.com/?linkid=9845756
Enjoy.