You can download the slides from my 'Build a Windows 8' session from this location.
You can download the ContactList sample, demonstrating the use of many WinRT and Windows 8 features (updated by Jonny Bekkum to be easier to run on your own machine).
You can download the SimpleNTier sample, demonstrating reuse of business and data code across Windows Forms, WPF, Silverlight, and WinRT (Windows Runtime).