In November, my husband had the great opportunity to give a talk "in" Belfast by Skype on the subject of the Gospels and Acts as history. (The world is getting so complicated that we need a new vocabulary. He was giving a talk in Belfast, but he was really not in Belfast at all. This is starting to sound like magic.) The sponsoring organization was Brian Auten's group, Reasonable Faith Belfast. I've been meaning to get the audio of the talk up here but am just getting to it now.
Here is the Youtube. The Skype talk (followed by interactive Q & A--technology is wonderful) originally did, as I understand it, allow the attendees in Belfast to see Tim talking with a bookshelf behind him, but the Youtube "video" is composed entirely of the Powerpoint slides.
If you want just the audio, it's here.