I'm sorry if this is not the right place to ask this, but I was wondering what happened to careeroverflow.com and if it is now permanently closed.
Also the primary answer to this question is per the comment by "Cody Gray" which states "As for the rest of your question, Career Overflow was a SE 1.0 site that is no longer being maintained". It is unfortunate that he chose not to leave an answer as I would have voted it up and accepted his answer.
Also it is really unfortunate that they chose just to pull the site without an announcement, or even put up a sign saying "We have decided to permanently end careeroverflow.com please see this FAQ for career questions on stackexchange in the future". Instead you are greeted by the message "The website "careeroverflow.com" has been disabled". That does not tell you whether it is permanent, or even why. I did searches on stackoverflow, meta.stackoverflow.com and programmers.stackexchange.com to try to see what was up and found nothing. Ultimately I think this is not a demonstration of good customer service/community relations.
Even the answer given "no longer being maintained" doesn't really say much but at least it gives a solid answer that careeroverflow.com is now dead and you need to look at the alternatives for these kinds of questions.