This is probably way for them to aggregate potential exclusive story ideas. I'd treat it like you were going to speak to a reporter anonymously, they may have your back, they may not.
It's so sad to me that people think of it this way -- not guaranteed. You should always be able to trust a reporter who promises you that. The unethical ones really burn us all.
I don't mean to disparage all the good journalists out there, they certainly exist and I have massive respect for the ones that go to jail for their sources. But WikiLeaks has already built a reputation and technical infrastructure, important things that this new site doesn't have.
