A Net celebrity that thousands of people loved to hate, would-be real estate speculator Serin announces his site is dead.
Photos: The blogger and the housing bubble

Physicists have proposed a design for a semiconductor computer circuit based on the spin of electrons. They say the device would be more scalable and have greater computational capacity than conventional silicon circuits. The "spintronic"--or spin-based electronic--device would extend the scope of conventional electronics by encoding information with the magnetic--or spin--state of electrons, in addition to the charge of the electrons. The researchers used a novel geometry to overcome the weakness of the magnetic signal, the current limitation to developing spintronics in silicon semiconductors.