The Smart Dust project is aimed at putting a complete sensing/communication platform inside a cubic millimeter, including power supply, analog and digital electronics, etc. Thousands or millions of these dust motes will all communicate simultaneously. Applications are all over the map. Instrumented hospital rooms so that your syringe knows if you're the right patient or not, instrumented bodies so that we can all participate in 3D virtual ballet, instrumented atmosphere so we can predict weather (did you see Twister? those sensors were way, WAY bigger than they need to be).