Turn down the brightness. The HTC Touch pro could dim the leds. It used a capacitive bottom panel with buttons underneath, similar to the way that the Magic trackpads work. Maybe the whole bezel would be capacitive and the bottom portion would have an indent and a button, where you only go home with a firm press on the panel, and the home button lights up when you run your fingers over it?
Yeah i suppose so. It would be be cool, though its like the clicking when you type on a iPhone, its great when you first get one because its so 'iPhone' but after a text or two it goes off and never comes back on