That was when I did a lecture on web design at the local TAFE here. I had all the students pull up the board as an example of a point I was making.
No, I would guess it's bots visiting the board, a combination of spam users trying to post and search engines crawling for results. Or it might've just been a glitch, that happens sometimes, but it also could've been that some popular site linked to the board for some reason, something like that... I used to have a statistics thing set up on the site which would note where visitors were coming from (like what they searched with Google or whether they clicked from a forum topic, etc) but I don't have that at the moment.