For years I've heard about an email debate that was conducted between John Frame (then Professor of Apologetics and Systematic Theology at Westminster Seminary California) and Darryl Hart (then librarian and Assistant Professor Church History at Westminster Theological Seminary in Philadelphia)--but I was never actually able to get my hands on a copy. The topic was on the Regulative Principle, and the relationship among Scripture, tradition, and culture. Frame--with Hart's permission--has now posted
the whole exchange online for those who are interested.