AIDS Cure?

Ezra Klein blogged about this earlier.  It's just one case, and it's apparently widely impractical, but this is infinitely better than the alternative.

Can any scientist-readers out there (cough cough *Dad* cough cough) shed some light on why the particulars of this case (creating replicas of gene mutations that are resistant to HIV/AIDS) aren't receiving more coverage? Or is this very much on the cutting edge?