Facebook seems like an awesome tool for keeping all your satisfied customers in one place. The number of satisfied customers (Facebook Friends) as well as real estate related positive comments seems like something you'd want to show off to prospects. Who knows, you might even get some new business from your Facebook Wall.
If you mix a suitable amount of personal things, updates, pictures, etc., it would probably do a lot to make us come off as real people when prospects are looking at us. In fact, it seems like a good idea to direct potential customers to your Facebook Page. There are settings options that allow you to make your Facebook Page public, so that people can see "all your stuff" without having to be on your Friends List.
Just my thoughts ...
