my sentia has blue eyes, i guess if you wanted to change them you could just get some new LED's but i think blue rocks. (and i wouldnt want to take my laptop apart) its the area 51m that change color depending on what ur doing... neat feature but you cant see the eyes while your working anyway.
in the area51m the colors are: green for external power, blue for battery power and red for hibernation. or you can set it to alternating mode and it will cycle through, im not 100% certain but thats what ive heard.