I guess the OP already answered his own question. http://www.plugcomputer.org/plugforum/index.php?topic=6003.0
Good job with the script.

Personally, I haven't figured out how to turn off the power light. The  LEDs are bright.

turn off bluetooth led:
/sbin/blinkbtled 0xf1010148 w 0x000

turn on bluetooth led:
/sbin/blinkbtled 0xf1010148 w 0x8000

to turn on LEDs:

echo 1 > /sys/devices/platform/leds-gpio/leds/guruplug\:green\:health/brightness
echo 1 > /sys/devices/platform/leds-gpio/leds/guruplug\:green\:wmode/brightness
echo 1 > /sys/devices/platform/leds-gpio/leds/guruplug\:red\:health/brightness
echo 1 > /sys/devices/platform/leds-gpio/leds/guruplug\:red\:wmode/brightness

turn them off by sending 0 to the devices.

You could do something similar to /etc/init.d/rc.local on shutdown.