I remember back when flying magazine ran an article on the Avanti and said that some of the designers who worked on it were also either lamoborghini, porsche, or ferrari (I forgot which one, sorry I'm not a big car person) designers/engineers as well.
Being able to cruise around at an Mmo of .7, at a fraction of the cost of a jet is a pretty big bonus too. I wonder what's keeping more businesses from buying them?