Ecomodding is a technical and physical approach to improving gas mileage. Modify the car’s physical characterics by making it more aerodynamic, eliminating useless weight (out! back seat!), and reducing rolling resistance, and increased miles per gallon will follow.
Like hypermiling this is a radical approach to the situation, and only true geeks make the extreme sacrifices and modifications to achieve their goals. But then, that’s what defines a geek, isn’t it?