Launched with the best of intentions, podcasts often have a short half-life. In fact, when revisiting my 2005 column on this topic, I discovered that five of the 10 had disappeared or gone dormant.

Among the podcasts from my earlier list that are no longer active are Evan Schaeffer’s Legal Underground Podcast, www.legalunderground.com/podcasts, last updated in January 2007; Evan Brown’s Internet Cases Podcast, http://blog.internetcases.com, last updated in February 2007; and the Supreme Court Watch Podcast (later, Justice Watch), http://allianceforjustice.libsyn.com, last updated in October 2007.