Something that I never understood about the Hubbel 4-way receptacles: it is arranged so that the _hots_ are on the outside from all sides. It would seem trivial to put the _neutral_ slots on the outside.
The Leviton 4-way receptacle actually puts the grounds 'up' on the top and 'down' on the bottom, and looks something like two of iwire's retouched decora duplex receptacles side by side.
-Jon
