The same technology used in Nintendo's popular Wii video game console that lets you bowl strikes and hit tennis volleys like you're Venus Williams is also making its way into mobile handsets. Responding to a flick of the wrist or sweep of the arm, tiny sensors called accelerometers, which measure linear acceleration in the Wiimote game controller, translate motion into action on the screen. When the technology is added to a cell phone, the handset's utility changes in several intriguing ways. It can, for example, function as a motion-sensing mouse that lets you browse the mobile Internet by tilting the device left, right, up or down.

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