It's working. At 215 kg (with full batteries), it's even lighter than expected.
See a video of the shakedown and rollout here:
http://www.youtube.com/watch?v=4tLzXR-P0ng
We have tested with 500 A per motor, it was a bit quicker than the old ICE car, but we broke a motor on the second day. The brushes simply soldered to the brush holder.
More info:
http://www.amz.ethz.ch/