I too have the numb toes problem, and I haven't really solved it yet. But I do have some advice. 1) I bought Gel inserts that only go under the balls of my feet from SPENCO. They are a cheap solution, and they definitely help (although they haven't cured the problem). 2) It was suggested to me that I switch my shoe/cleat system to one that has a wider cleat. Some road cleats span most of the distance across the ball of the foot. My current Shamano cleats have a contact point that is concentrated in the middle of my foot. It was suggested to me that spreading the point of contact across more surface area would help spread the pressure and stem the numbing. This is a problem that seems to be more common in women than men, as far as I can tell.