For those not familiar with Fr. John Anthony Hardon, SJ, he was a wonderful teacher of the faith who lived in Detroit. He trained catechists and wrote an adult catechism which helped me on the way into the Church; he gave retreats, and spoke to many audiences. He’s also noted for making converts: quite a few Catholics found or returned to the faith through an encounter with him.
Supporters of his cause for beatification are building a website presenting many of his talks in text form and as mp3s.
(A prayer for his intercession is posted on the home page of that web site.)