Since we're sharing videos, here's team 95's test chassis, taken sometime last week:
Video of Team 95's Test Chassis
(the gyro feedback has been fixed since this video, it's much smoother now)
It's a holonomic drive using omniwheels in an H-pattern, with some additional friction wheels on the corner to assist in bot-pushing and ramp climbing. We broke this one down, however, and are rebuilding the system in our final bot (integrating in a ball harvester and ball shooter).