I have to upgrade the forum software, so I'll be doing that tomorrow. The forum will be offline starting at 1pm EST for 1-3 hours depending on how much work needs to be done.
You guys can follow the forum on twitter @GDCforum for progress during the update.
As some of you noticed, I did the change in the middle of the night. There will be some errors until I have a chance to make one more upgrade, but it'll have to wait till tomorrow.