Dialectic 59: Joe Gebbia! @Airbnb co-founder @jgebbia is the first Chief Design Officer of the U.S and leads @ndstudio. I spoke to him about the newly announced http://america.gov, designing for trust at scale, and a quality bar for government services that passes the "grandma test." We discuss: - http://america.gov: one front door to 29,000 government websites - CritBuns, Joe's RISD project that taught him design is half product and half story - How design can create trust, from Airbnb to…