Check out this page, the ListView.swipeBehaviour:
This is damn near a blank page...tell you damn near nothing.
Now look at this old-skool MSDN page on the asp:dropdownlist:
Tons of stuff...remarks, how to use things, lots of sample code.
Damn near every page in the "Dev Center - Metro style apps" site is completely useless. I spent time for each of my issues when we were building out WIndows 8 HTML5 app to look at the Dev Center first...then Google second, which brings up nothing, then the only resource is the Metro forums.
There is absolutely zero evangelism for Windows 8 development.