Please find all the presentation of the ESRI Developer Summit available for download. You’ll find there great resources for the Silverlight and the Flex API including videos.
http://proceedings.esri.com/library/userconf/devsummit09/index.html
I had a little presentation as well there that you can download. Download my slides. Extending, Customizing, and Implementing the Situational Awareness Bundle
In this demo, we will explore the fundamental steps for developing, extending, and customizing the Flex map viewer for the ArcGIS for Situational Awareness bundle. Topics will include architecture fundamentals in GIS and the Flex map viewer and integration with ArcGIS Server. We'll present a new way to fuse information using the Flex map viewer to make better geographic reports and talk about using Flex and ArcGIS Server 9.3 to create a customized Flex map viewer that consumes data and online resources to analyze information on maps.
Cheers
Al