From the Sharepoint Team Blog:
… I wanted to briefly introduce you to the set of management packs (MPs) for Microsoft Operations Manager 2005 (MOM) that we’re delivering to help you monitor your SharePoint farm. We’re providing separate MPs for Windows SharePoint Services V3, Office SharePoint Server 2007, and Project Server 2007. The Beta 2 versions of these can be downloaded from the following locations:
I encourage you to go ahead and try these out on your MOM servers. We’ve gone to great lengths to support the most relevant monitoring scenarios and look forward to your feedback to solidify our monitoring capabilities. For more information on what we’re monitoring in each MP, take a look at the slidedeck for the “ADM 201: Using Microsoft Operations Manager to Monitor and Maintain your Farm” session, which I co-presented with Tyler Butler at the SharePoint Conference in May.
You can find this article here.