As Shawn mentioned, there is a new book that addresses these questions: "Turning Towards the Lord: Orientation in Liturgical Prayer" by U. M. Lang, Ignatius Press, San Francisco. See:
http://www.ignatius.com/ViewProduct.aspx?SID=1&Product_ID=2270&SKU=TTL-P&Category_ID=175 The book has a preface by Cardinal Ratzinger, who writes:
"At a propitious moment, as it seems to me, this book resumes a debate that, despite appearances to the contrary, has never really gone away, not even after the Second Vatican Council. The Innsbruck liturgist Josef Andreas Jungmann, one of the architects of the Council's Constitution on the Sacred Liturgy, was from the very beginning resolutely opposed to the polemical catchphrase that previously the priest celebrated `with his back to the people'; he emphasised that what was at issue was not the priest turning away from the people, but, on the contrary, his facing the same direction as the people. (...) Louis Bouyer (like Jungmann, one of the Council's leading liturgists) and Klaus Gamber have each in his own way taken up the same question. Despite their great reputation, they were unable to make their voices heard at first, so strong was the tendency to stress the communality of the liturgical celebration and to regard therefore the face-to-face position of priest and people as absolutely necessary.
More recently the atmosphere has become more relaxed so that it is possible to raise the kind of questions asked by Jungmann, Bouyer and Gamber without at once being suspected of anti-conciliar sentiments. Historical research has made the controversy less partisan, and among the faithful there is an increasing sense of the problems inherent in an arrangement that hardly shows the liturgy to be open to the things that are above and to the world to come. In this situation, Lang's delightfully objective and wholly unpolemical book is a valuable guide. Without claiming to offer major new insights, he carefully presents the results of recent research and provides the material necessary for making an informed judgment. (...) It is from such historical evidence that the author elicits the theological answers that he proposes, and I hope that the book, the work of a young scholar, will help the struggle - necessary in every generation - for the right understanding and worthy celebration of the liturgy. I wish the book a wide and attentive readership."
