LogicKeyboard is now shipping a custom keyboard for use with Apple's Aperture. The keyboard features keys marked with the applicable Aperture 1.5.x shortcut, and is available in either all-white or a mix of white and grey keys.
Computer connection options are USB or Bluetooth wireless; the keyboards themselves are standard-issue Apple models with only the keys changed.
The Danish company also sells an Aperture keyset kit for those wanting to replace the standard keys on a compatible Apple keyboard.
For more information and pricing worldwide, start by choosing your location on the
front page of the LogicKeyboard website. North American pricing is US$59 for the keyset kit, US$99 for the USB version of the keyboard and US$119 for the Bluetooth version, plus shipping. Instructions for installing a keyset kit are
here.