So I've been googling around and I think I've got most of the pieces of this puzzle figured out (_why was a great, eccentric developer, he disappeared and commited info-suicide).

But what I don't get is why the author of this article waited a year ('So I marked my calendar for the 18th, and waited. That was yesterday.') --- What indication did he have to mark his calendar for the 18th (was this an anniversary?)

I'm so very confused about this, but I'm intrigued.