WikiLeaks has shaken up the US, its allies and its enemies by dumping hundreds of thousands of classified documents on the Internet for anybody to see. Yesterday, because of what it called "massive cyber attacks," the company that provided its domain name cut off service. But WikiLeaks has already re-appeared using different addresses. Can it ever be stopped? We put that question to the computer scientist who sent the first Internet message. Is the WikiLeaks document-dump an act of journalism or something else? Are news consumers now on their own? Will WikiLeaks produce greater efforts at secrecy or greater transparency, both public and private?