Fox was just reporting that the new threat (re: Airlines) originated from the same website that the Nick Berg video came from. To you knowledge, is this report true?
Kinda sorta. The site that the Nick Berg video was found on has not come back up; the owners of that site have registered another domain name. They weren't the first to report this threat but by early afternoon I was finding the threat on every jihadi board that I looked it.
So yes, it is on the new incarnation of Ansar. It's also on a whole bunch of others.
What gives it credibility is it is being spread by the Global Islamic Media crew.