To those lacking the nerve to totally paint your laptop like an alienware, you could probably put a pretty snazzy personal touch by finding some type of sticker material that you could print of a cool design on, cut the pattern out of the sticker, and use that and some additional material to mask off everything but you laptop top lcd back part. Sort of like what they did on the movie Hackers, only it would be cool camelleon or metalic whatever.
If I can ever think of anything cool enough to put on a laptop that I'll probably have for about 5 years that I'm not afraid will look lame after a while I'll probably do this instead of trying to paint the whole thing.
Or you could combine both methods and paint your laptop all one color of camellon, and then put a design in it with another color, or just a glossy black, red, etc. I'd definittely try this on some other apparatus before you work on the laptop though.