The Microsoft eLearning web site includes a wide variety of different online training courses. I have used many of these to keep up-to-date with new releases and product features. Best of all, there are many courses that are available for free. One such course is Clinic 5935: Introducing Server Virtualization in Microsoft Windows Server 2008 (RC0).
While the naming and terminology of the Hyper-V feature uses some outdated terms, all of the major technical information should still be accurate. This is a good place to start with Microsoft’s E-Learning and to lean about Microsoft’s upcoming virtualization products. Thanks’s to virtualization.info for the link.