Did you know that an anagram for TSOMI is "IS TOM", and that TOM Kane was the voice of Captain Rottingham and The Welshman in Curse of Monkey Island, and also had some parts in Escape, like Pegnose Pete? He also have a lot of other parts in other games, a lot of them from LucasArts. For example Grim Fandango (Cat track announcer for example).
So it's been revealed. The Secret of Monkey Island is Tom.
(anagrams can be fun and informative some times)