Richard Anderson at dokeo kago grapho soi kratistos Theophilos has an interesting post on "The Role of the LXX in the Theology of the Early Church." Anderson points to the importance of the topic by noting:
. . . many early Christians spoke and read Greek, thus they relied on the Septuagint for most of their understanding of the Old Testament. The New Testament writers also relied heavily on the Septuagint in that the majority of the quotes cited in the New Testament are quoted directly from the Septuagint. Greek Church Fathers also quoted from the Septuagint. The theology of the early church, as explained by the Fathers of the first several centuries, is based on the wording of the Septuagint.Although I would probably take issue with a number of Anderson's conclusion the post is worth reading.