The government's PR branch has really done a number on you. It's absolutely legal to host or mirror Wikileaks, under any reasonable interpretation of the law; remember that the only way that the government can dig up a case on Assange is to try to label him as a co-conspirator in directly obtaining the information. Just distributing the material is protected -- it's the same thing that newspapers do all the time.
EDIT: On reflection, I shouldn't sound so confident, because I'm not a lawyer. But that's my understanding.
EDIT: On reflection, I shouldn't sound so confident, because I'm not a lawyer. But that's my understanding.