Keep It Cartesian. By creating an extra ledge for incoming/outgoing mail, keys, and cord control, a sweet seamless mix of form and function is created, saving you both space and money. A closer look of all the available switchplate options can be found after the jump.
More information can be found at Keep It Cartesian. No availability as far as we can tell, but hounding the designers usually works (but do it nicely, please).