Recently we were interviewed by Scott Mulraney, who writes as Andy Rane, and discussed how we began writing nonfiction. His website features interviews, primarily with fiction authors, using The Same Six Questions for each author. Since some of the questions dealt with characters and -- of course -- made-up events, he modified the questions just a bit to have them fit our nonfiction genre.
Take a look: The Same Six Questions -- Charlie & Diane Winger