Jon's been around a while and some of the piss and vinegar of youth may have subsided. He does tend to show up with LWN comes up, whether as a topic of discussion (or more often) from submitted articles. That's his baliwick, and again, I don't fault him at all for it.

Our other friend here is a more recent participant to HN, at least under this handle. (I don't know that there are others, only what I can see from this one.)