No they don't have permission but I could easily send dozens of sites using their photos. They had some sort of weird surge of popularity. Stewie's walking video was even on an msn tv show, since it was a youtube and I guess that's considered public as far as use for news goes.

The main problem here is they put a mark on it like it's there's. I can't seem to find any link for complaining though.

And that's Stewie in the blue sweater.