I just downloaded the episode and I didn't pay these guys a dime:
Host Ira Glass and Zoe Chace from NPR’s Planet Money talk with Jim Logan and Richard Baker of Personal Audio, which claims it holds a patent used by all podcasters. Podcasters, they say, owe them money. Only catch: their company never made a digital podcast or invented a way to download it into a listening device. What they did, back in 1996: they patented the idea that such a thing can be done. Now they’ve asked podcasters to pay them licensing fees.