Here is part 3 of the screencast series, were you will learn how to configure the dashboard, this really involves two steps, first configuring SCOM and secondly configuring SharePoint. The dashboard provides a way for managers, application owners, and IT professionals to monitor the availability and performance of business-critical applications and to view the reported data on a single web-based interface. BTW it is a free solution accelerator.
To view the other parts take a look here:
Part 1 Introduction: Screencast: System Center Operations Manager 2007 R2 – Service Level Dashboard part 1: Introduction