LAS VEGAS - Palm has announced it will sell smart phones through top U.S. mobile carrier, Verizon Wireless, a deal that could mark the beginning of a turnaround for the handset maker.Palm and Verizon's new Palm Pre Plus and Pixi Plus, announced at CES, become available on January 25. The touch-screen Pre Plus has double the 8GB memory of the original Pre, a more streamlined design, and has a new backplate which allows users to wirelessly charge the device on the Touchstone inductive pad without needing to swap the phone's cover. And the Pixi Plus, which features a QWERTY keyboard,...