What's a good F# tutorial/reference you've used?

I already knew Caml so it was easy to learn F# just by reading the MSDN articles and Channel 9 videos.

There is plenty of good stuff there.

http://msdn.microsoft.com/en-us/magazine/ee310108.aspx

http://channel9.msdn.com/Tags/fsharp

http://channel9.msdn.com/Tags/functional+programming

See my article http://jackfoxy.com/a-course-of-fsharp-study/ I've got a bunch of references to F# tutorials, articles, and references. IMO the best tutorial is http://en.wikibooks.org/wiki/F_Sharp_Programming