A set of 5 guided tours around Reporting Services have recently been created and are available (scroll way down!) here.

Topics include:

- SQL Server 2005 Reporting Services Report Builder
- SQL Server 2005 Reporting Services Model Designer
- SQL Server 2005 Reporting Services Report Designer
- SQL Server 2005 Reporting Services Report Manager
- SQL Server 2005 Reporting Services Report Viewer

 There's nothing really earth-shaking here, but these are good basic resources for someone new to the product.