I'm glad I just found this thread at this point, as the earlier messages were disheartening. He's scheduled to play here in NYC and I've been looking forward to it since I first heard about it. As of now, it does sound like the concert will go off.

He did a solo performance here a few years ago which was part concert, part discussion with the audience. Some past performers faced with this set-up were very uncomfortable taking spontaneous questions from audience members, or even annoyed about it. Not Andy Irvine! Not only was the music great, but he had a very engaging manner with the audience as well. He seemed to really welcome the questions and a chance to discuss his music or anything else people asked him about -- just a really warm personality. It was a really wonderful evening! So whenever he does get to your area, try and see him! Zhenya