Antony Flew was a very influential atheist philosopher who dominated the scene in the twentieth century. In 2004 he publically announced that he was no longer an atheist. His story is recounted in his very well written book There Is A God: How the World's Most Notorious Atheist Changes His Mind that I just finished reading last week - I highly recommend it. The appendices, especially the one by Tom Wright on Jesus and the resurrection are excellent.
The New York Times has an article on Flew that they ran in 2007. It's worth checking out. I really hope that he moves from being merely a deist (a belief in an impersonal Creator) to converting fully to Christ. It looks like he is on the way!