I've kept a close eye on the stats as they happen and I'm afraid I'll have to disappoint you all.
At least half of those "users" were search agent bots. It's good that they notice our site because it gets us noticed on the search engines. I suspect it's the same for most forums.
Heff's original post was to get the online community up above 100, then all of a sudden it exploded to 200+.