They walk. They work. New DNA robots strut their tiny stuff.

For the first time, microscopic robots made from DNA can walk, follow instructions and work together to assemble simple products on an atomic-scale assembly line, mimicking the machinery of living cells.

Wall Street Journal: 13 May 2010

The MSNBC news site also covers the story, but has a more realistic picture.  That is, I am pretty sure DNA robots don’t contain metallic exo-skeletons