Microsoft continues its commitment to customers success through regular release of cumulative updates.
CU 6 is now released which primarily introduces two types of enhancements and updates.
1. Business Processes.
2. Regulatory Updates.
CU7 is slated to be released during end of OCT, 2013.
Note: Note the change in numbering for the cumulative updates which will be released for AX 2012 R2 going forward.
Read the complete details of the enhancements and updates here on Microsoft Dynamics AX Product Team Blog.