Yes, the Pope did deiver an address in addition to announcing the creation of new cardinals.
He spoke of today's liturgical celebration: the Feast of the Chair of St. Peter. I'll have a translation later. UPDATE: Here it is.
This points to an interesting possibility - that Benedict will use the general audiences to catechize on the liturgy. The need for liturgical reform in line with Vatican II is very close to the Holy Father's heart, and he may use this particular weekly pulpit to take the "reform of the reform" directly to the faithful.
Pure speculation, grant you, but it's an exciting possibility.
