OK, so. I went to the official thread and figured out that the "extra puzzle" the announcement hinted at was the fact that a bunch of letters in the admins' and site moderators' posts were bolded. I wrote every single one of them down, 'cause I just know it's going to lead to something interesting.
The question I have is: ...what? What do all the letters mean? Do we have to unscramble them into words, or something? Does anyone know??