Ned Pyle has a comprehensive blog post that guides you through the important new stuff revealed at BUILD for IT Pros in Windows Server 8. Go read his blog post Windows 8 for the IT Pro: The New Plumbing.
If, like me, you want to start your reading with the Hyper-V stuff, here is the clip from his post to quickstart:
Virtualization, Networking, & High Availability
Enjoy. Thank Ned and leave a comment on his post if you feel inclined.