We've designed a lightweight chassis and arm (supposed to be 90 pounds, I believe), and we've built a drivable chassis, and did some "testing" this Tuesday and Wednesday. I have a few videos of it driving on Wednesday:
http://www.youtube.com/watch?v=W0XN6iSvCXo
http://www.youtube.com/watch?v=v_vUYyJAkCc
http://www.youtube.com/watch?v=YbluSr2Mf5Q
And, in case you were wondering, the drive code is very light, too.
Also, a team member should be getting a better video camera (it's actually a video camera, not a digital camera)