I am almost at a loss for words.
In 1993, JD and I co-wrote the alt.internet.media-coverage FAQ ( see http://www.uni-giessen.de/faq/archiv/internet.media-coverage-faq.part1-2/msg00000.html ) which helped manage what was then a nascent journalistic community on the internet.
JD was probably one of the strongest forces for good on the internet I’ve met. It is hard to lose friends, it is even harder to lose friends when they are so young. I have lost a friend but more importantly, the whole internet has lost a friend and one of the people who helped make discourse on the internet substantially better.