@LANDesk Staff, Tanner
Mainly because I have not figured out a better way yet, I rely on updates to the "Sustaining Patch Information" KB page via an email subscription to let me know when patches have been released for LANDesk. As of right now, Service Pack 2 has not been added to this document.
Updating this page may bring better visibility to Service Pack 2 (which so far is working flawlessly!)