This whole site is amazing btw, I you haven't already read it. The sections on electricity are especially good.
There was also a heartfelt plea to geeks to not shoot up their school, written in the wake of the Columbine massacre. I really felt that one.
When I started, I was getting huge international traffic, from people seeing near-instant page-loading when using 2400 baud dialup. I think classrooms were using it for ESL teaching. Also, huge traffic from the deaf community (any images w/text paragraphs, and ease of speech screenreaders. Unexpectedly this put me way high on google, when it finally appeared years later.)