There are some Duo modders that remold the plastics. the 5300's and 5x0's keys should be pretty easy to remold. There's a good how to at

http://www.powerbook.org/duo-zone-e/danger/clear-parts.html

As for the AlBooks, yes they're fiber optics. A friend of mine did a green key mod to his 17" PB and had it online for a couple weeks, but its not there anymore :'(