With the release of a new operating system this can never be enough training material released to get you up to speed. Over on TechNet there is a great article that complies a lot of resources for Windows Server 2012 Hyper-V. If you are looking to get ahead of the curve and learn as much as you can I highly recommend checking it out. Please let us know what you think.
Microsoft TechNet – Windows Server 2012 Hyper-V Network Virtulization Survival Guide.