I thought the old NPR podcasts were pretty good introductions: http://www.npr.org/blogs/money/2011/07/13/137795648/the-tuesday-podcast-bitcoin http://www.npr.or

I thought the old NPR podcasts were pretty good introductions: http://www.npr.org/blogs/money/2011/07/13/137795648/the-tuesday-podcast-bitcoin http://www.npr.org/blogs/money/2011/07/13/137795648/the-tues... http://www.npr.org/blogs/money/2013/04/09/176688096/episode-450-bitcoin-goes-to-the-moon http://www.npr.org/blogs/money/2013/04/09/176688096/episode-...