I searched around and didn't find anything here on this topic. I am so addicted to using the key fob and having my Prius automatically unlock when I touch the door handle without having to take out my keys. I have had my car for a couple of years and I still get excited about how well that works. As a long distance runner training for a marathon I frequently take the key fob off of my key ring (by separating it from the metal key portion of the fob) and tuck it into a pouch or put it in my pocket while running. I have started to think that it would be cool to take apart my spare key fob and see if I can embed/attach the smallest possible portion of the key fob into my running shoes somehow. As a matter of fact, I wish that all of my shoes had a little Prius pod in them like the Nike+ thing so that I could just leave my house key in my car and never even worry about taking my keys with me. Everytime I put on my shoes I would have my Prius key! Does anyone know if this is something that someone else is already working on? I saw that Toyota is making an iPhone app. I would love it if my iPhone worked as a key fob too via bluetooth or something.