¿how small is small enough?

nano car on wheels,

The nanocars (1) remained effectively stationary on the surface up to approximately 170 C. As the temperature increased above this point, the molecules began to move in two dimensions through a combination of both translation and pivoting, not in the 1D manner initially expected. For example, at approximately 200 C, the motion of the nanocars (1) is, on average, slow enough to be followed through a series of 1-min images.

and a "pocket" size reading device for blinds

6-centimetre-square prototype just one millimetre thick which weighs five grams.

to watch:nano letters

still searching for useful applications: spray computing

The number of potential applications of the scenario is endless, ranging from smart and invisible clothes, intelligent interactive environments, self-assembly materials and self-repairing artifacts.

spray your network, another vision. long way to go ...what's the use of invisible clothes?