There is also an AP news story about Flew's decision.
Flew says he is a theist but not a Christian. From the interview:
HABERMAS: C. S. Lewis explained in his autobiography that he moved first from atheism to theism and only later from theism to Christianity. Given your great respect for Christianity, do you think that there is any chance that you might in the end move from theism to Christianity?
FLEW: I think it’s very unlikely, due to the problem of evil. But, if it did happen, I think it would be in some eccentric fit and doubtfully orthodox form: regular religious practice perhaps but without belief. If I wanted any sort of future life I should become a Jehovah’s Witness. But some things I am completely confident about. I would never regard Islam with anything but horror and fear because it is fundamentally committed to conquering the world for Islam. . . .
HABERMAS: I ask this last question with a smile, Tony. But just think what would happen if one day you were pleasantly disposed toward Christianity and all of a sudden the resurrection of Jesus looked pretty good to you?
FLEW: Well, one thing I’ll say in this comparison is that, for goodness sake, Jesus is an enormously attractive charismatic figure, which the Prophet of Islam most emphatically is not.