I've occasionally seen billboards in my area for the "Paintless Dent Removal". Billboards usually said something like "most dents $75".
I work part time at a detail shop and do mostly cars from used car dealers. They pay a service to come to thier lot and take out small dents. They refer to them as "ding pingers"! LOL!
wriken, I saw that DingKing product at a local auto supply store the other day. If you try it, let us know how it works (or doesn't).