There is a chef out in Cali that runs an all raw, vegan restaurant. I believe that his name is Juliene. Yes, just Juliene. I immediately dismissed the idea of raw, vegan, fine-dining, but I think that has more to do with the fact that he is pompous and self-righteous, and considers himself to be some kind of Adonis.
Though this diet is not for me, I can see the potential health benefits. Cooking tends to draw off many vitamins and minerals in fruits and veggies. When you eat them raw, you eat them just as nature intended. This would really have to be a vegitarian, almost vegan kind of diet. I don't think I would, personally, last a whole week on it. Cooking can also break down certain fibers, so eating a raw diet would greatly increase your roughage intake. My only question is where would you get your protein? Overall, this diet would kill me (LOL), but I think that it could have its benefits. It has got to be healthier than the normal American diet, at any rate.