Microsoft recently announced public preview versions of Windows Server 2012 R2 and System Center 2012 R2 at the TechEd Europe 2013 Conference in Madrid this week. Here are a some resources you can use to get an early look at these preview releases. In addition to Windows Server 2012 R2 and System Center 2012 R2 Preview downloads, there are also evaluations for Windows Intune, SQL Server 2014 and the Windows Azure Pack. Check them out.

MS TechNet Resources:

Microsoft Preview Evaluation Releases

What's New in Windows Server 2012 R2

What's New in Windows Server 2012 R2 Essentials

What's New in System Center 2012 R2

Evaluation Guide for System Center 2012 R2 and the Windows Azure Pack

MS Virtual Academy Jump Start Events:

What's New in Windows Server 2012 R2 Jump Start

What's New in System Center 2012 R2 Jump Start