I love those James Cameron comments. And yes, he's right about the circumcision/HIV story, we've had that in Nature years ago too. Also condoms. It is quite amazing to see the regularity with which old news is recycled, certainly in the science news sphere, I think when a new paper is pubished, the journalist concerned seems uninterested in comparing what is written in that with the earlier literature. Often they just copy out a press release without even reading the paper, and of course the press release is a notoriously unreliable, exaggerated document.