For those of you interested in Hayley's singing with Mario Frangoulis in Boston next week, I just came across a Youtube video of an interview with Mario which has a lovely segment on Hayley. You can find the video directly by Googling "youtube wbz radio frangoulis". (Sorry! That is the best that I can do.). The segment begins at 4:30 on the timer.
I think that you have it correct for the second duet. I kept thinking that I may have been hearing "It", which didn't make much sense. "If" sounds like a good title for a song. I had noticed that the concert will be recorded live, but I would not expect an airing in the immediate future. PBS programming is laid out much in advance. I have a subscription to the local PBS station's monthly programming magazine, and shall be on the look-out for the concert.
It is hard to say. The programming for the PBS stations around the country varies timewise usually, unless a preplanned presentation is being made of something with national interest. As I recall, the Boston PBS station never aired "Live From New Zealand", while New Hampshire and Rhode Island stations did. However, I shall be watching for it each month from now on in the Boston monthly PBS programming magazine, as well as for anything about it appearing on the web. I can well imagine that it will be an excellent show to watch. Hoping that we all get to see it.