The Zboard is the Holy Grail of designing custom keyboard layouts for games. The Zboard is revolutionary in itself in the fact that if you want to play a certain game, say MOHPA or Doom 3, all you need to do is plug the keyboard into a base and select "Enable keyset" and select the game you want. Once its done, you will have one touch access to all the game commands. You can even swap out one keyset for another. In the words of a certain someone, "Unfortunately, no one can be TOLD what the Zboard is, you have to see it for yourself."
Take a look at the
Doom 3 keyset and the
MOHPA keyset. Costs around $45 for the keyboard base and around $15-$20 for the limited edition keysets.