Not a few of the blogs and news outlets mentioning the 1970 letter of Ratzinger and eight other theologians calling for a new and open discussion of the discipline of celibacy speak of it as though it were a call for the abolition of the law requiring celibacy of those to be ordained as priests. This is, however, a quite unjustified "reading into" the text of the letter, which states that those entering into the discussion should do so with an openness to whatever the outcome of a renewed and frank discussion of the issue might be, but explicitly refrains from proposing what the outcome of such a discussion should be (whether retaining the law regarding celibacy, or changing it).
Cardinal Walter Kasper, one of the other eight signatories to the letter, recently affirmed just that in an address to the Catholic University of Lisbon, namely that he had proposed a discussion of priestly celibacy, not its abolition. Moreover, he suggested that the discussions of celibacy that have taken place do not favor a need for change in the discipline.
"There have been three world synods that have spoken of celibacy, and it was decided to maintain this discipline, and I myself believe that celibacy is a good for the Church."
At present I don't have access to his full address. If I get it, I will post it or a link to it here.