Fr. Jay Scott Newman has a nice little post up in defense of the traditional stance of the celebrant during Mass. Our Holy Father has also defended this stance in his book The Spirit of the Liturgy (available from Ignatius). It seems that there are more and more places turning back towards the liturgical East, even in parishes where the newest rubrics are in use (nothing in the current rubrics forbids this orientation), and to me, at least, it seems like a good idea, for the reasons offered by the likes of Fr. Newman and the Holy Father.