Its been down here too for at least a couple of days:
Many functions can be found in the Modems SCC at 192.168.0.1 or by opening the Download Status meter.
You could try accessing other account aspects by using the "old" support page:
http://customercare.myhughesnet.com/
I used it yesterday to make a one-time payment.
What specifically are you attempting to access? perhaps a work-around can be suggested.
All of the links work for me OK.