On Saturday I started to use the new FB feature that allows you to basically switch modes and log in as the dealer. Taking it one step further, I then began to copy and paste the email address of customer that just bought cars. I mean they literally had left within the hour. When I did this it pulled up their profile and I was able to write on their wall as the dealer thanking them for visiting us and that we hope they enjoy their new car. I also liked that on our wall it shows the post and the FB profile pic of that user. I actually pondered posting my discovery on DrivingSales, but figured it had been out for awhile. I then noticed a tweet this morning from @marshacollier with a description of the process/feature so perhaps this is newer than I originally thought. The link gives a pretty good how-to as well.
So far, I've noticed some decent impressions and there haven't been any negative (or for that matter positive) feedback from any customers I've done this to. I was considering even posting a thank you or some followup on customers we didn't make a deal with too, but I'm not so sure, due to whatever caused them not to do the deal if this is a good idea, then again, what would we have to lose?