This demonstration shows how to use the client object model from a Silverlight application. (Length: 11:15)
This video provides an overview of how to use the client object model from a Windows Presentation Foundation application. (Length: 5:38)
This video provides an overview of Business Connectivity Services for SharePoint 2010. (Length: 1:58)
This video discusses the architecture of Business Connectivity Services. (Length: 2:15)