As mentioned earlier, the outer area of the keyboard is constructed of aluminum (or so it seems). If you look at the area around the keypad, you'll notice that above and below it is plastic, surrounded by a thin layer of aluminum. It seems that the entire keyboard is made out of plastic with a thin overlay aluminum skin on the surface. This overlay is very well done and I had to look several times to see that it wasn't completely made out of aluminum.



Link: OCIA