The Silverlight 4 business application training course is a set of videos and labs divided into eight modules for learning about building business applications with Silverlight. The primary focus of the training course is to learn about the new features in Silverlight 4. Existing preliminary material is gathered together to go over the features that are now available.
The eight modules cover: an introduction to Silverlight 4, WCF RIA Services, authoring basic controls, interacting with system resources, advanced controls, printing, running out of browser applications, and MEF.
You can work through the course either online or by downloading a large chunk of the resources to run locally.