There was a comment here the last time this story was submitted that summarized things well: http://news.ycombinator.com/item?id=2007265

Nope. HIV-1 versus HIV-2, and this treatment would have been less effective against HIV-2.

No, there are many, many strains of HIV virus. One person's infection evolves into a wide variety of strains during an infection due to immune system pressure.