Another good faith healing story is this YouTube video, where James "The Amazing" Randi debunks the TV Faith healer Peter Popoff.
I've also seen this story on a few TV specials. Popoff was using a wireless earpiece and was getting his information from his wife, who was reading them off of prayer cards. Honestly, did it never occur to these people, "Wow, he just told me exactly what I wrote on my prayer card fifteen minutes ago! What a coincidence!"
An amusing anecdote related to the Randi/Popoff case was how Randi first publicly played the evidential tape. It was on the Tonight Show with Johnny Carson. Randi made sure the show manager didn't tell Carson about the tape, just so he could see Carson's face when he played it! There was apparently an expletive that had to be edited out for the broadcast.
Daylight Atheism also has a good article investigating faith healing. These faith healers are nothing more than con artists. The only question seems to be whether or not any of them believe in themselves. In the case of Popoff, clearly no. But I've heard that many faith-healing recipients do briefly convince themselves that they are healed. If the faith healer only sees them when they believe they are healed, maybe he really can believe in himself. It's an enforced delusion.
Unfortunately, as the Primoridal Blog series shows, most people who come to realize that they aren't cured after all, blame themselves. They decide that God had taken aware the healing out of spite, because they didn't have enough faith. Some are even estranged by friends, under the conclusion that they must be harboring secret evils. So now it's a self-reinforcing delusion. It's not evidence that God doesn't exist, because he does exist, so it must be something else.
Anthony Thomas's documentary A Question of Miracles (which I would like to see, if anyone knows how to find it on DVD) included some follow-up with people healed by faith-healer Benny Hinn. One of which was a brain tumor patient, who died a couple of months after being "healed." The parents were later interviewed:
As the couple discuss their child's succumbing to the tumors, no allusion of any measure is expressed of Hinn being culpable of perpetuating false hope. The couple sees themselves, not Hinn, as a possible cause that their son did not receive a healing. The father suggests his son's death may be a result of generational curses or sin of either himself or his father. When the HBO interviewer asked where he arrived at such a notion, the father responded, "Pastor Benny."
Now it isn't just a self-reinforced delusion. This is an actively enforced scam! It sounds like Benny Hinn might be another 'faith healer' that doesn't necessarily believe in himself. Another note: this is after they pledge several thousand dollars to Benny Hinn.