chapter 2: building your first Windows Phone application
Twitter Search is a step-by-step walk through on creating your first Windows Phone application
chapter 6: a journey into Silverlight on Windows Phone
Graphics includes Brushes, Fonts, Transforms, etc.
Controls includes ToggleControlSwitch, TextBox inputscopes, WebBrowser, WebBrowser + Scripting
Navigation includes a wizard-like page navigation sample
ApplicationBar is a trivial sample demoing ApplicationBar class
Orientation shows basic SupportedOrientation at page level