Richard Morgan, a former atheist who found salvation in Jesus Christ. His testimony is fascinating, as part of his conversion story came about through his interactions on the Richard Dawkins website discussion boards. He has appeared on the Unbelievable? Radio program (here / MP3). He talks about his background, how he arrived at atheism, how he viewed God, his encounters on the RD forums, and his conversion to Christianity. He also offers some words of insight for Christians and atheists. You can also read about his story in this PDF.
Full Interview MP3 Audio here. (46 min)
See also, The Dawkins Letters by David Robertson, mentioned in the interview.