A set of SCOM 2007 SP1 specific training videos are now published on TechNet at http://technet.microsoft.com/en-us/opsmgr/bb986763.aspx. There are two videos out there I am doing on new reporting features in SCOM 2007 SP1. Here are the links:
Using the Microsoft Generic Report Library
This video demonstrates generic overrides report.
Running Time (minutes): 6:16
Using favorite reports and the report publishing feature
This video demonstrates favorite reports and report publishing features.
Running Time (minutes): 6:44