I have a late 2008 Unibody 15 inch MBP, and I kinda wanted to switch the color of the keys in some way. Is there anywhere where you can get keys of a different color that wouldn't interfere with the backlit keyboard?
I recall someone in the past putting white keys on their MacBook Pro. (Or perhaps it was a MacBook, it was a while back.) Although, that would interfere with the backlight. Without interfering with the backlight, I don't believe there is an option for you short of paint keys.