Motorola just got FCC approval today for their "Wireless Wheels" remote controlled cars, developed in cooperation with Nikko, that we spotted at CES. The cars, expected to be used as a tie-in between Nextel's NASCAR sponsorship and its iDen handsets, are controlled using a Zigbee dongle that can either be plugged into an iDen or a dual-joystick remote.  If it's connected to the iDen handset, users can see animation of the car's movement on the phone's screen as well as hear sounds and feel the phone vibrate as the car motors along. Each Wireless Wheels set includes a car, a remote and a dongle, although there's no word on how much they'll cost.

US Army testing Stryker robot tank