getting started with F#

I followed the C# tutorial hello,_mac here:

http://docs.xamarin.com/guides/mac/getting_started/hello,_mac

I would like to repeat the same exercise with F#. I don't see the any header files in xcode or the designer file in Xamarin Studio.

Am I missing something? Are the some manual steps I need to make (anywhere to read about this?) or is the F# support not there yet?