I got udev to create the correct permissions for my phidget by adding the following file.
I have the 0/16/16 controller. I have no problems accessing it from user
space when I'm in group phidgets now.
/etc/udev/rules.d/30-phidgets.rules:
# Udev rules file for phidget devices
SUBSYSTEM=="usb_device", SYSFS{idVendor}=="06c2", GROUP="phidgets"
