Microsoft made the public announced today about the availability for Windows Server 2012 R2 and System Center 2012 R2 and Windows Intune updates.  On October 18th, 2013 eligible customers will be able to download the new versions through a variety of channels, and evaluation versions will be made publicly available through the TechNet Evaluation Center.  On November 1st, 2013 these products become available for new purchase

More details on  “What’s New in 2012 R2.

Microsoft will announce to partners through MPN social channels and MPN newsletterPartners can access information on the latest versions of our products and licensing at www.MicrosoftPartnerServerandCloud.com. We are not communicating any information regarding the RTM dates at this time. Customers who have active MSDN or TechNet subscriptions, and those customers that have access to future versions based on their VL use rights will get it via VLSC downloads on October 18, 2013. The latest update to the Windows Intune online service will roll out to existing subscribers.

Please find more announcement details's in Brad Anderson’s Blog