Windows Server 2012 Essentials (the latest version of Windows Small Business Server Essentials) is a flexible, affordable, and easy-to-use server solution designed and priced for small businesses with up to 25 users and 50 devices that helps them reduce costs and be more productive. Windows Server 2012 Essentials is an ideal first server, and it can also be used as the primary server in a multi-server environment for small businesses.

Product highlights: 

• Enable a dynamic, modern work style with access from your devices by using Remote Web Access (RWA), and take advantage of Windows Phone 8 and Windows 8 devices for a superior experience with rich modern “My Server” apps.
• Enjoy peace of mind knowing that your data is well-protected by complementing your on-site backups with Windows Azure Online Backup, as well as utilizing integrated support for the new Windows 8 File History feature.
• Choose the email and collaboration option that’s right for you, whether that’s in the cloud with Office 365 or a hosted service provider, or running on a local server.
• Quickly and easily respond to increasing data capacity needs with support for Storage Spaces, which allows you to create elastic, resilient storage for your files and folders. (One of my favorite new features in Server 2012)
• Run the line-of-business applications that you depend on by leveraging our greatly improved application compatibility, now with a single logo certification for all Windows Server 2012 editions.

Resources:

RTM Announcement - http://blogs.technet.com/b/windowsserver/archive/2012/10/09/windows-server-2012-essentials-released-to-manufacturing-available-for-evaluation-today.aspx

Windows Server 2012 Essentials Tech Page - http://technet.microsoft.com/sbs/jj159331

Windows Server 2012 Essentials Product Page - http://www.microsoft.com/en-us/server-cloud/windows-server-essentials/default.aspx

Download a Trial - http://www.microsoft.com/click/services/Redirect2.ashx?CR_CC=200142589

FAQ - http://download.microsoft.com/download/0/B/2/0B22F531-338D-4843-B43B-814D922EB724/Windows%20Server%202012%20Essentials%20FAQ.pdf