I'm a bit torn between whether this is good news or outright horrible news. The good news is of course that those carrying the HIV can be treated. The bad news is that those who would need it the most will not be treated, since they are not rich, influential, or possibly even take care about themselves. The virus can still spread undetected (before the carrier gets tested), and if it is "treatable" with affordable medicine, even the deterrent of getting potentially deadly disease will vanish, which may increase the risk of it spreading. Though I guess there's a good amount of people who are willing to take the risk (such as folks going to doctor to get antibiotics for whatever and then save them just in case they'd get a disease during their trip to Thailand). Of course, governments could budget money for check ups for the people having the greatest risk and provide the treatment to people carrying the HIV. If they have the money. Though the UN could fix that by providing the medicine. Unless, of course, the government doesn't accept such evil communist plots to taint our precious bodily fluids, enable gays or whatever.
Assuming it won't be public domain (serious good karma if the researchers did that), it'll be pretty good business for the corporation to patent it though, since it's guaranteed that the patients will take the medicine for the rest of their lives (if I understood right). Call me a cynic if you want, but the drug industry doesn't want cures, it wants treatments. In the last years, I've heard several times about a potential cure for cancer. But those won't be picked up, since the risk/reward ratio is off. Cures might not pass trials, and even if they do work as advertised, they might not pay enough to warrant pouring more money into trials and further research.