The panel of Vikings is online and it is one of the greatest I have seen. It has everything in it.
It is funny, it has spoilers and even we fans got appreciated. It is great to see them all out there.
|Source History Channel e-mail I got|
And on the next link you can find the interview they did with Yahoo TV in the special build Longboat.
I think there will be more interviews to find but this is the only one I could find at the moment.