Incidentially, Dan and I were married at a place called Hilltop. It is an old all-girls horseback riding camp located in Spring Green, WI - just across the street from Taliesin. It was designed by a man with the family name Fritz and is very much in the priaire tradition. From what I have learned, Herb Fritz was an apprentice to FLW.
On a realted note, I am currently finishing "Loving Frank." A great story, by Nancy Horan (an Oak Park, IL native) based on the life of FLW, his family, his lover and her family. It is a quick read and I highly recommend it to anyone that is interested in learning more about his work. It is also a love story - about a woman who loves FLW and a woman who is trying to find herself. I was enamored with Mamah from the first page.