Chernoff Faces are one of those HCI ideas that seem clever but have never really worked great in practice. See also: pie menus, zoomable user interfaces. At lea

Chernoff Faces are one of those HCI ideas that seem clever but have never really worked great in practice. See also: pie menus, zoomable user interfaces. At least those latter two show up occasionally in real products, I don't think I've ever seen Chernoff Faces used in a final product.