The photos (mockups?) look as if they've coated the circuit board with something to protect it, but still present it to the end user. What's this process called? Who does it? I'd be very interested, since making boxes is kind of a pain!
My guess is that it's just a piece of machined aluminum on top of a circuit board. The metal has the cutouts required for the bits on the board to poke through.
They are a really cool company. Taking things that are normally difficult and not very nice to look at all the while keeping it in reach of the masses. I'm really impressed with these guys.