I saw this just now, thanks to Surry Hills Library. It is brilliant, though there are still a few rough patches because of the way it was made. The DVD has a good documentary on that, and how it was a particularly challenging (and brilliantly done) restoration job. The movie was never seen in anything like the form Welles intended until 1992! Just look at the sublime opening!
I have added the ending of the movie to the Vodpod. See also the Internet Movie Database. There are some famous names in it aside from Welles himself — Micheál MacLiammóir as Iago for example. I thought Fay Compton particularly good as Emilia.