I have been hearing about F# and Microsoft now have a guy who is blogging and coding away in redmond somewhere about it. Can you really write GUI code from F# (I\'d love to see
Yes, you can certainly write WinForms apps - although you wouldn't override the OnClick method, you'd subscribe to the Click event.
Yes, F# has full access to .NET, although you won't get very idiomatic functional code if you use a lot of mutable types.
Tomáš Petříček's F# web site has sample source code from his book (disclaimer: I'm involved with the book too, so I'm clearly biased) which has WinForms examples.