It looks like the Pope has got well and truly into the spirit of things!
Although according to the BBC, the hat is part of the Papal costumes, except that the hat was last used by that radical Pope, John XXIII, who died in 1963.
Aside from the fact that this shows that Pope Benedict is a bit of a snappy dresser, it shows he has some sense of fun and you get the impression that if you met him, he would be like some benevolent great-uncle.
Although it would be nice if he also showed more of a continuation of the reforms that the Roman Catholic Church put forward during the Second Vatican Council, which he helped to initiate. Much as I love the Roman Catholic Church, I feel that they, in fact the rest of us Christians as well, need to do more to reach out to people and not leave anyone feeling unwanted or unloved!