run script when USB serial device unplugged?

[Tom Horsley]

So I'm reading about udev and have this script that
does correctly run when I plug in my solidoodle printer:

SUBSYSTEMS=="usb", ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="0483", RUN+="/usr/local/bin/solidoodle-connect"

I see an ACTION="add" environment variable inside the
script which gets run.

But, when I unplug the device, the script is not run and
I never see an ACTION="remove".

Anyone know how to notice when a USB device is removed?