Esther says "I sang with a small group in front of it in Princeton, at the house of the owner's widow, Judy Scheide, and then a few days ago I sang in front of it again with the same select group of Monteverdi Choir people at the event marking its installation at the Bach Arkiv in Leipzig."
You can read the whole story in the New York Times report and if your German is up to it the story from the Leipzig Bach archive.