I'm having trouble accessing the forum today too. Not sure if it is the computer here (at work). I guess I will find out when I try to get on tonight from home.
You are not imagining things. The forum has been down for most of the night. Now it is very slow and some of the images are not appearing. I just called Sparklit the parent company of Activeboard who hosts the forum. They apologized for the problem. They are working on it to put things right. Be patient and all will be back to normal soon.