|DNA does the splits|
Still in a medical-nanotech vein (yes, pun intended), "Nanoparticle Completely Eradicates Hepatitis C Virus." If a nanoparticle can be designed for that virus, why not others? I'm game for a cure for the common cold.
Still thinking small, "Transistor Made Using a Single Atom May Help Beat Moore’s Law." Like the living flash memory, this was only a proof of concept, alas.