blah!bLaH!BLOG has a couple of posts about SharePoint and SQL Server Reporting Services
SharePoint and Reporting Services - Introduction
SharePoint and Reporting Services - Installation and Setup.
SharePoint and Reporting Services - Setup your database.
SharePoint and Reporting Services - Authoring a simple report.
SharePoint and Reporting Services - Enabling end users - the report model.
If you are doing any SharePoint and SQL Server Reporting Services development then do yourself a favor and visit the links above