Here's another video of it doing close to 0-radius turning:
- http://www.youtube.com/watch?v=0gk-yQ1H3M8
This prototype reminds me more of big dog: - http://www.bostondynamics.com/robot_bigdog.html
A quick google search didn't turn up anything at deere.com. But, the device was made by Plustech, now Timberjack. Anybody find anything more specific?