One of my colleagues, and a long-time mentor, is Dr. Daniel Wallace. Several years ago he began the Center for the Study of New Testament Manuscripts to advance textual criticism of the New Testament in many different areas, from advancing the theory and practice of the discipline to taking digital photographs of all existing New Testament manuscripts. Recently the Center announced its availability on iTunesU. This is a great step forward in many ways. Those who are interested in the discipline can get some basic training, and those who have some training can continue to learn from one of the most accomplished textual critics alive today. Highly recommended to all NT exegetes.