Today’s Bolletino confirms that 11/30 is the date.

AVVISO DI CONFERENZA STAMPA
Si informano i giornalisti accreditati che venerdì 30 novembre 2007, alle ore 11.30, nell’Aula Giovanni Paolo II della Sala Stampa della Santa Sede, avrà luogo la Conferenza Stampa di presentazione dell’Enciclica del Santo Padre Benedetto XVI dal titolo: “Spe salvi“.
Interverranno:
 Em.mo Card. Georges Marie Martin Cottier, O.P., Pro-Teologo emerito della Casa Pontificia; Em.mo Card.
Albert Vanhoye, S.I., Professore emerito di Esegesi del Nuovo Testamento, Pontificio Istituto Biblico.

Cottier is an 85-year old Dominican, elevated to non-voting Cardinal by John Paul II in 2003, Pro-Theologian Emeritus of the Pontifical Household, former Secretary-General of the International Theological Commission.
Vanhoye is an 84-year old Jesuit, Scripture scholar, and former rector of the Pontifical Biblical Institute,  who was made a non-voting Cardinal by Benedict in 2006.
From John Allen:

Described by sources who have seen the text as an “extremely spiritual” document, the encyclical will be presented by French Dominican Cardinal Georges Marie Martin Cottier, former theologian of the papal household under John Paul II, and Jesuit Cardinal Albert Vanhoye, an emeritus professor of exegesis at the Pontifical Biblical Institute.
(Some Roman wags observed that merely by bringing the Dominicans and Jesuits together, Benedict has already provided a sign of hope for peace in the church!)