Molecular tic-tac-toe

I was asked yesterday by the New Scientist to comment on a recent paper describing a molecular automaton to play tic-tac-toe (noughts and crosses). My remarks appear in the resulting news article (I'm not sure if it will make it into the printed edition). Readers familiar with the area will know that this work builds on earlier work on a molecular machine, built by a subset of the group responsible for this latest construction.