Quantum Levitation

It's just happened at St. Andrews University in Scotland.

Long story short: Scientists there turned the Casimir Force on its head, converting it from attraction to repulsion and enabling levitation.

Wrote Cristina Jimenez in the August 10, 2007 Financial Times, "Ulf Leonhardt and Thomas Philbin think they can cause an object to repel rather than attract another in a vacuum. The St. Andrews scientists have worked out how to shift the normally "sticky" quantum force of empty space from attraction to repulsion by placing a "perfect lens" between two mirrors. Thanks to this arrangement, the repulsive force of the quantum vacuum may levitate the upper mirror."

Details here.