saw them at demos at trade shows. They motor is so powerful, it's like the equivalent of a lawn mower!
Plus, because of the glass pitcher, you can add hot liquids in while blending, to make hot soups. Something that can't be done with with the plastic pitchers most blenders have.
We got to sample quite a bit of the foods that were demoed. My favorite was the tortilla soup.
Check out Yahoo Groups, they have a few Vitamix groups there with recipes & tips. One of them even has the tortilla soup recipe.
http://groups.yahoo.com/search?query=Vitamix