Top score was 1027 or something like that by the alliance that won it, though they got that score in the Franklin elims. Next top score was 600 something.
Most effective autonomous strategy:
One robot drive forward. Other robot gets the close chute, then comes over underneath the robot that moved forward and lines up for the 2nd chute. Then the robot that moved forward fights for the third chute.
The Lego wheel treads that made us such an effective pusher:
http://www.peeron.com/inv/parts/2997
Good luck finding it! If you do though, it fits perfectly over the 3" wheel and doesn't slip under high load. It's NOT an iWin button because you still need to understand the fundamentals of traction and motor power curves, but if you do the homework they will definitely give a robot a
large traction boost.