Podcasts are shaping the presentation of history through audio delivery. Hosts of several local series tell us why they chose this new technology to delve into the past and how they gauge success. Hear clips of each program in a special podcast challenge! With David Gallagher and Woody LaBounty (The Western Neighoborhoods Project Outside Lands San Francisco), Liam O’Donoghue (East Bay Yesterday), and David Boyer (The Intersection).