Hey Jame, yeah it was down for me last night (well early morning
) and still down when I crawled out of bed, and still down some time after that a couple hours ago. And then I had a suspicion, and went in through the main page. I found out the old page link I had that I'd been just refreshing was no longer valid and linking in from the main page I had to log-in again.
It looks like the changeover is complete and the forums are up with the new look (not the temporary look of the last few days), but you may have to go in fresh from the main page and log in again to get to the forums.