I remember reading an article in Dr. Dobbs journal from something like 1993 about how Adleman used DNA computation to solve an instance of the travelling salesman problem. How is this work really revolutionary then, aside from demonstrating the use of molecular computation techniques on a more complex problem. As far as I can tell this isn't 'news' so much as it has already been done, published and publicised before, by the same physicist/mathematician/biochemist.