Yeah, Priscellie's promotion didn't get announced because it was sort of a stealthy side-effect of putting her in charge of making sure the news feed for jim-butcher.com is more active than I've been managing to make it, and because I've totally not had time to make any sort of Official Announcement about the promotion. I figured others would beat me to the punch.
In general, we'll try to announce such things as new moderators, new boards, other relevant important "broadcast" things on the Announcements board, as Mr. Finn mentions.
We will NOT however be making much in the way of posts about who's been banned; banning sucks, and I see no call to make a parade out of it by talking about it somewhere prominently (or much at all).