it would seem that you can add stuff to the calendar and make it a topic about it as well to provide information about the topic. I believe you can also have it locked automatically so it will just be a news post, and also select where to put it... Say you could add "Game Reveal" on friday and have it post to the news section and say "Watch for PS Blog on friday revealing our game!" in the subject
If you hadn't noticed, this is Forum 2.0