Father Z: "I picked up from Il blog degli amici di Papa Ratzinger that H.E. Most Rev. Raymond Burke (Prefect of the Ap. Segnatura) wrote a preface to a canonical study in German of Summorum Pontificum by Fr. Gero P. Weishaupt.
In his preface, Archbp. Burke says, inter alia, that neither altar girls nor Extraordinary Ministers of Holy Communion are admissible in the Extraordinary Form of the Roman Rite because the integrity of the Rite must be respected..."