SharePoint 2013 Service Pack 1 has been released (re-released). Note that while Service Pack 1 does support Windows Server 2012 R2, Windows Server 2012 R2 support requires a new SharePoint 2013 with Service Pack 1 ISO to be released. Slipstreaming or installing RTM and then SP1 on Server 2012 R2 is not supported.
Project Server: http://support.microsoft.com/kb/2880553
Foundation Language Pack: http://support.microsoft.com/kb/2880555
Server Language Pack: http://support.microsoft.com/kb/2880554
Office Web Apps: http://support.microsoft.com/kb/2880558
Office 2013 Client: http://support.microsoft.com/kb/2817430
List of Server Updates: http://support.microsoft.com/kb/2850035
List of Client Updates: http://support.microsoft.com/kb/2850036