...here is the presentation about Silverlight and EPiServer CMS 5 from EPiServer Developer Summit May 2008.
Just unzip to your project and ad the project to your solution make sure you have the Silverlight link correct, view properties for your EPiServer CMS 5 project. You can also download the Deep Zoom presentation. Feel free to use and change the code. We will post another player later on with more advanced features probably using a streaming server and more advanced templates as well.
Thank's for a great Developer Summit it was fun to meet you all!
(Make sure you add all the settings to your web.config-file..)