Veteran developer of software for PDAs and smartphone (and recent Handmark acquisition) Astraware has released a new motion-controlled racing game called GTS World Racing for the iPhone and iPod touch. Available at iTuneshere, the game uses the iPhone's built-in accelerometer to allow players to accelerate, brake and steer their car by moving and turning the device itself. The game includes 64 track layouts and offers a choice of multiple car types and difficulty levels, as well as four play modes - Single Race, Challenge Cup, Grand Tour, and Championship. See video below to see GTS World Racing for the iPhone in action.