This training kit now has the following :
Windows Phone MIX10 videos
Lab – Using Push Notifications
Lab – ( Hello Phone ) that provides an introduction to the tools and steps to build and deploy windows phone applications
Lab ( Building Your First Windows Phone Application ) that introduces the basic building blocks of the Windows Phone Silverlight Applications and the creation of a puzzle game and talks about the phone features like navigation,frame and navigation services , multi-touch and isolated services .
Lab (Windows Phone Navigation and Controls) introducse the Windows Phone layout system and the controls and talks about the navigation between different screens .
Lab ( Game Development with XNA Framework for Windows Phone ) intruduces the XNA game development on Windows Phones .
Read more: Senthil Kumar's Blog
Official site: Windows Phone 7 Developer Kit site on channel9