Microsoft announced at Tech Ed North America that BizTalk 2013 hit RTM and that it will be available soon !

Feature Description
Platform support BizTalk Server supports the following platform stack:

  • Windows Server 2012 R2, Windows Server 2012, Windows 8.1, Windows 7 SP1.
  • Microsoft Office Excel 2013 or 2010.
  • .NET Framework 4.5 and .NET Framework 4.5.1
  • Visual Studio 2013
  • SQL Server 2014 or SQL Server 2012 SP1
  • SharePoint 2013 SP1
Updates to the SB-Messaging adapter SB Messaging adapter is enhanced to support SAS (Shared Access signature) based authentication, in addition to ACS.  With this new improvement, BizTalk Server can now also interact with the on-prem edition of Service Bus. For more information, see SB-Messaging Adapter.
Updates to the WCF-WebHttp adapter WCF-WebHttp adapter now supports sending and receiving JSON messages. BizTalk Server includes a wizard to generate XSD schema from a JSON instance. BizTalk Server also provides two new pipelines for processing JSON messages. An Encoder and Decoder component is also available for use in custom pipelines. For more information, see WCF-WebHttp Adapter.
Updates to the SFTP adapter SFTP adapter now supports two-factor authentication and provides an option to specify a temporary folder while uploading/downloading large files. You can also select the Encryption cipher value specific to your target server. For more information, see SFTP Adapter.
Updates to HL7 Accelerator HL7 Accelerator now supports the following:

  • Provides capability to include free-text data as part of the message that can be processed by the HL7 pipelines.
  • 64-bit support for hosting Hl7 adapter.

You don’t need to wait until Host Integration Server vNext in order to use BizTalk 2013 R2, because Host Integration Server (HIS) 2013 works and is supported to work with BizTalk Server 2013 R2 !