To use it, all you have to due is download/install the latest version of the F# Empty Windows App (WPF) template in VS11. This will generate an F# project with all the needed WPF assembly references. It also automatically installs the FSharpx.TypeProviders NuGet package and provides the starting point for creating WPF apps with the new Xaml type provider.
Here's a screenshot that's pretty similar to what Steffen showed in the announcement post. Note: The button and label were manually added after creating the project from the updated template.