Jeroen Tiggelman posted a summary of newly available STIG compliance checks for zSecure Audit 2.1.1 on the Service Management Connect - System z blog. The new checks are centered around IBM MQ for z/OS.
An overview of all available compliance controls can be found in a new technote.
If you are planning maintenance for zSecure, you might also want to read up on recent updates to reduce storage use and boost performance.
You might also be interested in Issue 21 of the zSecure Newsletter in IBM Security zSecure on developerWorks