Channel 9 has a number of screencasts / webcasts that show how to create an application using Prism ( Composite Application Guidance for WPF and Silverlight ).
Creating a modular application using Prism V2
A four part screencast on creating a modular application using Prism v2.
Prism Screencast Part 1: Creating a Shell and Modules
In this screencast, you will see how to divide an application into modular pieces and how to recombine them again in a shell. View here.
Prism Webcast Part 2: Visual Composition
This webcast demonstrates how to create placeholders for views in Prism and how to load views into them. View here.
Prism Screencast Part 3: Implementing Views and Services
This webcast demonstrates how to create a view using the Model – View – ViewModel pattern, and how to create and inject Services into your classes by using the Unity Dependency Injection Container. View here.
Prism Webcast Part 4: Decoupled Communication Between Modules
This webcast demonstrates how to communicate between the different modules. View here.
Other Prism Tutorials.