Covered only a few aspects of business application development in Silverlight. Didn't talk about printing and reporting at all. Wasted much time talking about Bing Maps and InkPresenter. Missed lots of significant topics including the navigation framework, RIA svcs and entity framework, data entry forms, and the MVVM model.
As an introductionary text, it's very nice, however, I recommend that it's trimmed and published as a short tutorial better. For the Bing Maps sections, they're better published as blog posts :D