Victor Gaudioso has another
Silverlight video tutorial demonstrating how to use the LocalMessageSender and LocalMessageReceiver to send async messages.
Source: Victor Gaudioso's Silverlight Blog
In this 11 minute video I show you how to use the LocalMessageSender and LocalMessageReceiver to send asynchronous message across two UserControls but it will also work with two Silverlight applications on the same HTML or even in two separate browsers (heck even with a OOB app and a browser app)! You can even send XML and use it to send complex object types.