Bitcoins have been the subject of two recent podcasts: one on NPR's Planet Money and one on Freakonomics. The one on Planet Money ("Bitcoin Goes To The Moon") discusses the recent volatility in the price of bitcoins. There's also a link to an earlier 2011 Planet Money podcast ("Bitcoin"), which talks about the nuts and bolts of the Bitcoin system. The Freakonomics podcast ("Why Everybody Who Doesn’t Hate Bitcoin Loves It") examines what bitcoins are and why bitcoins (or something like them) could prove to be revolutionary. As the folks at Freakonomics put it: "thinking of Bitcoin as just a digital currency is like thinking about the Internet as just e-mail. Its potential is much more exciting than that." Both the Planet Money and Freakonomics podcasts can be downloaded from iTunes or you can listen to them at their respective websites. Just follow the links above.