My favorite Austrian economist (actually, he‘s German!) is Hans-Hermann Hoppe. Here he is giving a lecture in Brazil (the intro is in Portuguese but his lecture is in English) about private law society. If you enjoy this, you should consider listening to his lectures on CD–they are a joy for the anarcho-capitalist and the anarcho-curious alike! For a taste of Hoppe, check out my review of his book Democracy: the God that Failed.
[youtube=http://www.youtube.com/watch?v=WUL764U5-h4&feature=related]