[Volundr]

FYI, I was getting the exact same thing, and called the 800 number, and was told that there were specific issues related to my (ID) exchange and that they had techs working on it.

Sure enough last night I was able to get in with the credentials I signed up with.

I won't be signing up for any plans through it though, similar coverage would cost me about the same as what I pay now. Then again, my employer picks up 50% of my premium, so for some people it may represent a huge savings.