[Asterisk-Users] voicemail notification - LED solution

[Roger]

Does anyone know how to send a message to a Cisco 7940/7960 phone 
running SIP images 6.3 telling it to light up one of its LED's when new 
voice mail arrives?

I found alot of web based solutions

http://www.voip-info.org/wiki-Asterisk+GUI

and easy ways of getting email or getting paged of a new voice mail - 
but nothing where you can just look at the phone and see a blinking 
light or illuminated LED indicating new voice mail..

Thoughts?