There is a new training series from MIX University out around Silverlight. The entire application is written in Silverlight itself and really well done. You even get access to the source code if you want to see how they did it!
There are a lot of training videos out there on the web for Silverlight but what I like about the Fire Starter Kit is that it gives a holistic approach that builds upon a conceptual foundation first.
" Want to learn more about Microsoft's newest technology powering several popular rich media web sites? We just published the Silverlight 1.0 Fire Starter, an excellent introduction to Silverlight 1.0 development. Unlike many of the available tutorials which jump right into code and implementation, this series of 8 lessons takes time to cover the introductory conceptual level before stepping into code. This is a great starting place for someone to learn what Silverlight is, why it's important, and how to get started building sites. And when you're finished watching the lessons, you can try tweaking the source code for the site! "
Check it out today!