During our recent car trip, we listened to a couple interesting mp3's in the car. I recommend them both.
A recording of a lecture Peter Kreeft gave a couple years ago at the MacLaurin Institute at the University of Minnesota. Kreeft is a professor of philosophy at Boston College and author of a number of books.
An episode of Speaking of Faith, a public radio program hosted by Krista Tippett. This episode is a discussion with Paul Elie, author of The Life You Save May Be Your Own: An American Pilgrimage. Elie compares and contrasts the pilgrimages of Trappist monk and author Thomas Merton, southern writer Flannery O'Connor, philosophical novelist Walker Percy, and journalist and social activist Dorothy Day.