Mine was still down when I got home
Rang TS and the guy was on the phone with me for about 20 minutes. First I was getting nothing. After rebooting PC and modem, everytime I opened IE I was getting the "register your modem" page.
Despite going through the whole process about 10 times, I was met with the same thing. He went away and said he'd call me back in 15 minutes.
After about 10 minutes, I rebooted the modem and it started working!
He did call me back though, so good on him and he did confirm the problem was their end and that a few people have had the same "register" issue.
I don't know anymore than that though.