I am sure that you have heard that the release of the New Roman Missal, Third edition will bring about some changes in the ritual text and prayers of the mass. Beginning with the First Sunday of Advent 2011, dioceses will be adopting the new text. Some time this year most parishes will begin some instruction in the new prayers.
If you are curious, the United States Conference of Catholic Bishops or USCCB has put up a web page with the changes, which are designed to be a more accurate translation of the original prayers. To check out their site click the link below: