I just finished assembling my eggbot.
When I plug in the usb connection nothing happens.
I've tested with Win7, Ubuntu 10.04, and opensuse 12.1.
In windows when I plug it in nothing happens. The add new hardware dialog does not show up.
In Linux there are no usb event in the /var/log/messages when I plug it in.
When power is applied the 3.3v green led illuminates and the motor moves a bit.
I've tried a different usb cable with no change.
Not sure of anything else to check.