I was wondering how many people would prefer keyboards without the "Windows keys", especially the one sitting between the left Ctrl and Alt.
I would definitely pay (a little) extra for a keyboard with an empty space there, but it seems that, currently, no keyboard manufacturer has models with that "feature". Even the ones selling "gaming" keyboards usually just disable or remap that key to something else, instead of leaving an empty space.
Maybe if enough people "suggest" it, some keyboard manufacturer (Steelseries, Rosewill, WASD, Cherry, etc.) will consider adding a "winkeyless" model or two to their lineup.