It happens every so often. I found when I was trying to print stuff it was down for a good portion of the day. You just have to try back later. I'm not sure if you could call them about it though...I just waited.
I was having problems logging in too (I was trying to check to see if my results were reported).
There is a bulletin that states that all those who need to schedule CS to graduate in 2008 need to do it NOW b/c they are really backed up. Some of my classmates, I'm in 2007 have to take it the week before we graduate b/c they waited so long to schedule it. Maybe everyone is panicking and scheduling it = overload.