Microsoft has release Windows Server 2012; it’s the start of something big with everything going to the Cloud and being a Cloud OS.
You can find the official blog post here.
Information on the different editions and pricing can be found here.
Together with this release, Microsoft has created a website where you can find all information; check it out here.
A trial version can be found here, check it out!
Windows Server Essentials 2012 isn’t part of this release; it’s still a Release Candidate.