John Lennon's legacy lives on, in righteous and sometimes improbable ways. The same week Sean Lennon and Yoko Ono put up this New York City billboard - part of their Artists Against Fracking campaign urging Gov. Andrew Cuomo not to rush a study investigating the health effects of fracking - it was announced that parts of Lennon's recently published private letters, many mere notes or lists that one critic calls "scraps of paper turned into bank notes," will be released as an app. Sigh. Time and capitalism march on.