Not really what I have done to it but I spotted my old SVX that I sold over a month ago and was able to drive up beside it and wave to the guy I sold it to. I was driving my SVX at the time so he did a double take when I honked, once at the car and then again when he recognized me. He e-mailed me a few weeks after he bought it and said he had fallen in love with the car.
I told him he should join the network but don't think he has registered yet.