I didn't understand the part where Wikileaks and Tor are supposed to have different goals. I thought the point of Wikileaks was to publish information anonymously - surely Tor would be suitable to help with that (Tor as it is supposed to work)?
I must admit that I am simply too chicken to use Tor. In Germany I think it can actually get you in trouble if some pedophile exits through your node.
Also last I checked, there really were some issues with the security model. That was quite a long time ago, not sure if they have been fixed now.