I have a pair of Specialized Road Shoes and they have holes in the soles for both SPD and Look cleats. At the time I bought them I told my LBS I wasn't sure I was going to stay with SPD pedals on the road bikes and this is what they recommended. I have since got my hands on a pair of Look pedals so now all I have to do is buy the Look cleats and I can try them out without having to buy another pair of shoes.
Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways, champagne in one hand, strawberries in the other, body thoroughly used up, totally worn out and screaming: "Yeah Baby! What a Ride!"