Roger von Oech is the author a classic book about innovation called A Whack on the Side of the Head. Believe it or not, this is the twenty-fifth anniversay of the book. When I was young(er), this book was the rage for the personal-computer generation in Silicon Valley. Join me on Sun's site for an interview of Roger. In it he discusses twenty-five years of innovation and provides advice to today's newfangled Web 2.0 companies. Click here for the interview.