The slides and demos from my MIX10 session "Building Windows Phone Applications with Silverlight" can be found here. This package includes the following:
· .snippet files
o BrowserAndPhone – A VS 2010 project that includes a shared control referenced from a Silverlight 3 project and a Silverlight for Windows Phone project
o InputScopes – An app that puts all the available InputScopes inside a ListBox and applies the selected InputScope to a TextBox
o Accelerometer – An app that moves a Button based on the accelerometer
o MediaAndVibrate – An app that shows media playback and the vibration API.
o HTMLCube – Shows that the WebBrowser control supports transforms and projections
o Chess – The traditional Silverlight chess app ported to the phone. Instead of using the hosting browser’s script engine, this sample uses the scrip engine in the embedded WebBrowser control.
o PictureGrayscale – This sample shows the CameraCaptureTask and applying a grayscale to the captured image.
The video of my session isn’t posted yet, I’ll update this post when its available.
 And the video is up: http://live.visitmix.com/MIX10/Sessions/CL16