While a full keyboard would be cool, that wouldn't be useful for us at all. However, this three-button device seems perfect for home arcade machines. For example, on the front end the buttons could be start game, up one letter, down one letter or something, then in MAME they could change to Exit Game, Options, Insert Coin. The ability to have three buttons that change their appearance when they change their functions would rock. $100 is a bit steep, true, but that would be cool.