EL sheat? Theres enough room in those to add an inverter and cables so you could mess around with some EL sheet/sting.Power might be a little tricky but the thing supports two batteries. Maybe try adding a window to it? I don't think PC modders have tried either of those ideas on a laptop.

Course you could take a look at Apple Design (inter-library loan will probably be the only way) and work with a trashed Apple Idea.