I notice that they want journalists to sign. It's great that they have so many already. I think the below quote from their statement is brilliant!
The statement includes a quote from the United Nations Special Rapporteur on Torture Nils Melzer who investigated the case: “it finally dawned on me that I had been blinded by propaganda, and that Assange had been systematically slandered to divert attention from the crimes he exposed. Once he had been dehumanized through isolation, ridicule and shame, just like the witches we used to burn at the stake, it was easy to deprive him of his most fundamental rights without provoking public outrage worldwide. And thus, a legal precedent is being set, through the backdoor of our own complacency, which in the future can and will be applied just as well to disclosures by The Guardian, the New York Times and ABC News.”