I had thought that imaging atom-to-atom bonds would not be possible. Atomic-bond resolution microscopy
That is impressive. I think I stumbled over this a month or so ago on PhysOrg.com Scientists Image the 'Anatomy' of a Molecule (w/ Video) which has a little more detail on their methods.
I think that the truely massive breakthroughs will come when they perfect the manufacturing of metamaterial lenses for sub wavelength optics that should allow actual sharp images to be taken of the structures rather than the less precise use of a force based probe to obtain the imaging.