Graphite. Knew it. Yawn.
Graphite is a bunch of carbon flecks that slide over each other. These guys claim to be making the stuff in a single continuous sheet (one giant molecule). Carbon bonds are dang strong. Imagine a material as strong as a diamond, but made in 2 dimensions instead of 3.
If they can somehow mass-produce it and build up layers it would bloody useful in a lot of applications. Imagine armor that is light, flexible, and dang near indestructible.
These are pure carbon compounds, like diamonds and graphite, discovered by Richard Smalley in the 80s. Nano Technology.