Fraid not. But that does sound pretty good. My battery has run out in the key and the charging bit for it is damaged (and due to the cover falling off repeatedly a few years ago it's been superglued on ), so I can only lock/unlock the car using the key itself
Nice. It's something I'd love to look in to on the side, I love little electrical projects that I can do in my spare time. And once you know how to do it you can really make some interesting things.
I thought there was a ultra rare option on the 4G that there was a sensor on the door handle and when you walk next to it, it opens up.. There were some pictures of this as well.