Check out the Windows SDK RC1 docs online:

http://windowssdk.msdn.microsoft.com/en-us/library/default.aspx

You'll find my Windows Forms/WPF interop (aka "Crossbow runtime") docs under the "Migration and Interoperability" node:

http://windowssdk.msdn.microsoft.com/en-us/library/ms753178.aspx

My samples are located under the "Migration and Interoperability Samples" node:

http://windowssdk.msdn.microsoft.com/en-us/library/ms771510.aspx

Hope you like 'em!