Found this in the New York Times this morning:
http://www.nytimes.com/2011/09/13/health/13gene.html?pagewanted=1&_r=1&hp
I don't know enough about the science of gene therapy to know if this is operating in the same space as BLT. There is no mention of sRNA or Drna but it does talk about using parts of the DNA. Anyway, something to pass the time.