Here's an interesting article about applied Quantum Mechanics in the Science Daily article Quantum Computers And Tossing A Coin In The Microcosm. An experiment at the University of Bonn in Germany demonstrates that the random motion of an atom in between uncertain quantum states is very different from the Brownian random motion described by classical physics. Experiments like this may contribute towards the development of quantum computers, which are conceptually very different from the computers that exist today.