Boldrin on Intellectual Property http://www.econtalk.org/archives/2009/05/boldrin_on_inte.htm...
Blakley on Fashion and Intellectual Property http://www.econtalk.org/archives/2010/06/blakely_on_fash.htm...
pg groupies may also want to check out the Econtalk interview with Paul Graham. Finding it is left as an excercise for the reader, primarily to encourage people to check out this amazing resource.