Sharp has developed a widescreen Windows Mobile-based PDA for a new Japanese cellular carrier that will begin service next month. The EM-One is compatible with EMobile’s high-speed third-generation data service that will launch on March 31 and offer download speeds of up to 3.6Mbps. Also packed into the device is 802.11b/g wireless LAN, Bluetooth and a tuner for Japan’s mobile digital television broadcasts. A full qwerty keyboard slides out from behind the display for typing, and the device also sports a camera.