The Fountainheads

Speculation abounds about the relationship between Frank Lloyd Wright and Ayn Rand. Was Wright the inspiration for Howard Roark, the architect hero of Rand's The Fountainhead? What can be made of their collaboration on the book's failed 1944 movie adaptation, and what can be gleaned from the 1949 Hollywood production of The Fountainhead? Where does the FBI--Wright was dubbed a communist sympathizer, and Rand was called before the House Un-American Activities Committee--fit into the story?