IP.html?ex=1032680615&ei=1&en=afad4a1316c65a41">HP creates dense molecurlar scale circuits:

At the same time, the scientists said they were startled to discover that their ultratiny switches were behaving in ways not yet completely understood. The switches exhibit swings in electrical resistance that vary by a factor of 10,000. The huge shift is useful for determining when the switches are on or off, but cannot be explained by existing theoretical physics.