It has been reported on another blog that Archbishop Piero Marini, the papal Master of Ceremonies was going to become Adjunct Secretary of the Pontifical Commission Ecclesia Dei. It seems there has been a bit of confusion about which Marini is getting the job. It's Mario Marini, not Piero Marini.
Here is the official announcement.
NOMINA DEL SEGRETARIO AGGIUNTO DELLA PONTIFICIA COMMISSIONE "ECCLESIA DEI"
Per mandato del Santo Padre, l’Em.mo Card. Darío Cástrillón Hoyos, Presidente della Pontificia Commissione "Ecclesia Dei" ha nominato Segretario Aggiunto della medesima Pontificia Commissione il Rev.do Mons. Mario Marini.