Chechen Chat Arabic websites are quickly going 404, but this Islamic Russian chat room in Chechnya is still active. A fair site for general information too; it has an abridged translation of Mullah Omar's Appeal for Jihad.
Understanding your enemy A Khilafah document on the mujahadeed viewpoint. Also the assam.com site posting bin Laden's 1996 bayan declaring war on America went 404 since it was posted here yesterday. The document was indeed authentic and quite informative on bin Laudin's history and goals. Please relink if you find another copy.