Via e-mail from Erin Billy, Founder and Director of TM:
"Hi there. Thank you for contacting TestMagic about our forums. Unfortunately, they are 'down' right now, meaning they are not functioning. The site had a hard-drive failure, meaning we need to rebuild the entire forum. With luck, we will be finished within a few hours, but it's appearing more likely that it will be longer, perhaps a day or two, before the forums are up and running again.
I apologize for the downtime and am working as hard as I can to get them up and running."