Normally this wouldn’t merit a link, but (a) it’s Friday, (b) it comes recommended by MEMRI, and (c) it wasn’t published by a jihadist mouthpiece. Al Hayat is a fairly liberal, respected Arab newspaper.
Still, a written message conspicuously signed by Captain Jihad himself? Someone’s trying awfully hard. Even the World’s Most Alarmist Website took a pass on it.
The nearly useless Google translation of the page is right here.
Update: Also, isn’t it sort of redundant at this point?