Two readers (thanks Dominic and Chris!) sent in links to audio archives - both with variously questionable content. The first is from Boston College and includes some talks by "Voice of the Faithful" (read: Heretical Horribles) folks, among other speakers of varying levels of orthodoxy. The second archive has talks by Protestants (and maybe some Catholics?) about religion, secular culture, public policy and science.

Make of them what you will, but they're expansive and here they are:

The Boston College Front Row archive

The Faraday Institute Archive