Meet the Lynxmotion Johnny 5 Kit: an indoor & outdoor tracked robot platform that can perform on many different surfaces. It can be controlled from a PC with DB9 cable or Bluetooth. Johnny 5 comes with a 2800mAh battery.
You can control the Lynxmotion SSC-32 Servo Controller board with the SSC-32 Servo Sequencer Utility. You can get yours from RobotShop at this time.