Where has he been? Apparently, treatment for his salivary gland cancer didn’t go as well as hoped:
What happened was, cancer of the salivary gland spread to my right lower jaw. A segment of the mandible was removed. Two operations to replace the missing segment were unsuccessful, both leading to unanticipated bleeding.
A tracheostomy was necessary so, for the time being, I cannot speak. I make do with written notes and a lot of hand waving and eye-rolling. The doctors now plan an approach that does not involve the risk of unplanned bleeding. If all goes well, my speech will be restored.
(via code blog)