I believe I can safely assert that the three Pauls are in agreement that The Fourth Debate was the final word on Presuppositional Apologetics as far as they, personally, are concerned. PA has been shown, increasingly and repetitively, not to work. It doesn't convince atheists, and it doesn't convince those theists (the majority) who claim to have evidence for the existence of God. It appears that PA is only considered valid by those who already hold to it. As an apologetic method, therefore, it's a dismal failure.
For some people, however, this isn't enough. Chris Bolt of the Choosing Hats blog and podcast
All of which leaves me with a nagging question: for whom is Praxis Presup intended? Certainly not atheists, who — if they bother to listen — will only be confirmed in their conviction that PA is nonsense. Evidential theists won't be convinced, as PA claims their approach is invalid. The only people who will agree with Chris Bolt's analysis will be presuppositionalists themselves — and why do they need this, if they are already convinced by PA?
It's a mystery.
*It's been brought to my attention (thanks Fergus!) that there is indeed a working podcast feed for Praxis Presup: http://www.choosinghats.com/category/podcasts/feed/