Check out The Digital Photography Show #41, an hour-long podcast interview with photographer/attorney Bert P. Krages. His Web site says:
Bert is an attorney who concentrates on intellectual property and environmental law. He is recognized nationally as an advocate of the right to take photographs in public places, having appeared in media such as National Public Radio’s Morning Edition, Popular Photography, Shutterbug, and Wired.
He’s also the author of the ubiquitous PDF leaflet The Photographer’s Right and the book Legal Handbook for Photographers: The Rights and Liabilities of Making Images (which I have and heartily recommend).
Listen to the interview at The Digital Photography Show
Via PhotoAttorney