Since the WS ended, I think it's been three or four times now. I'm not sure what you mean by official capacity, though. There's different tiers of blogs there. There's Players, Pros (beat writers and such) and then Fans. As much as I'd love to be paid to write about the Yankees, I don't think either of the newspapers and such down here would have a market for that!
As for what made me happy today - I got an offer to be moderator at one of the other two boards I frequent. I'm pretty stoked about that because I've only been there a short time compared to a lot of the other members.