You probably have missed Microsoft releasing three Ops Mgr MPs — most likely because the Ops Mgr MP download catalog was moved to Pinpoint (not very fond of that move Microsoft).
In any case, here are three Ops Mgr MPs just released:
Compute Cluster Server 2003 MP for Ops Mgr 2007
This MP monitors events placed in the Application event log by Compute Cluster Server 2003. Highlights events that may indicate possible service outages or configuration problems, so you can quickly take corrective or preventative actions.
Commerce Server 2007 Management Pack
This MP supports monitoring for Commerce Server 2007. Requires OpsMgr 2007 MOM 2005 Backward Compatibility MP Update 6.0.5000.16
DFS 2003 MP for Ops Mgr 2007
This MP monitors events placed in the Application event log by DFS and raises alerts to indicate possible service outages or configuration problems that require operator intervention.