Keep hanging around the forums, and you'll see a good number of Transmodes that folks have. I've always found them interesting. They're often quite unique, and come with interesting stories. One of the common usages I've seen is as a mobile news broadcasting "van". Airport shuttles were common as well, and I think blood banks. I believe there is a special one that was used to move GM executives around for certain events that had huge windows in the side for showcasing concepts/models driving by, and another that was famous for transporting NASA personnel. Some get turned into food trucks these days.