To answer a couple of questions, from what I understand, Tom had a brain tuma. He had a lot of medical issues with various infections and other problems over the past few years (one reason why he didn't get as much done on game development work as I thought).
In December I believe there was a brief, and indeed quite abrupt message from him on the audeasy mailing list, which, as people may know, he was the moderator. One reason this is such a shock is that as has been said, last we heard he seemed to be getting better, or at least that was what we hoped.
Sad news indeed, and a major loss, especially to long time community members who likely knew Tom as a friend (some of my own and others' reminiscences see the topic in the news).
With our dreaming and singing, Ceaseless and sorrowless we! The glory about us clinging Of the glorious futures we see,
Our souls with high music ringing; O men! It must ever be
That we dwell in our dreaming and singing, A little apart from ye. (Arthur O'Shaughnessy 1873.)