Christian History is still steadily pushing out its content on-line from the Fall 2003 issue. The latest on-line article is:
Three Wise Men from the East
The "Cappadocian Fathers" brought the best gift of all: a powerful scriptural defense of the Trinity and Christ's divinity against the Arian heretics.
by Edwin Woodruff Tait and Chris Armstrong
In other words, this article is a good introduction to Basil of Caesarea, Gregory of Nazianzus and Gregory of Nyssa.