Well, wide chassis w/ 4 wheel skid steering, all powered. Obviously the drive isn't installed yet.. right now it's on a test robot w/ our electronics guys.
We plan on a conveyor type system to run between those wood panels, and feed the huge hopper (we estimate it holds around 20 balls), then a front panel on the hopper will drop and (the hopper will have an agitator) the balls will drop out...
If you check out
http://www.youtube.com/watch?v=Lcjl8nWDzmo at around 0:32 is a little clip of how we plan to coveyor the balls up.