The radio/tv program was the first time I heard the theory that the NSA is tapping the routers upstream from the 9 companies mentioned in the PRISM slides. If so, this could conceivably make the public denials by the companies of any knowledge of PRISM be truthful, while simultaneously allowing for the ability of PRISM to tap into the traffic going into the internet companies.
Very interesting -- thanks for posting! Pretty cool podcast too.