Tons of Project Samples:
http://code.msdn.microsoft.com/windowsapps/Windows-8-Modern-Style-App-Samples

And don't forget the Channel9 BUILD 2011 videos, tons of good stuff in there:
http://channel9.msdn.com/Events/BUILD/BUILD2011

And don't forget to read this!
Windows 8: Top 10 Reasons Why I choose XAML Over HTML5
http://css.dzone.com/articles/windows-8-top-10-reasons-why-i