Oooh, what a FUN site, leBFG! Cheers 
If Reiki therapists can detect an energy field with their hands, then they can clearly do so blindfold. Yet when I asked a reiki therapist, who said she could easily detect my energy field, to close her eyes and tell me when I moved, she was not able to do so. When I sat absolutely still, she thought she could feel me moving near her.
This supports my suspicion that reiki practitioners can be quite genuinely feeling "something", but what they feel is internal to them rather than to any other person. It seems quite feasible that a person might feel some response of her nervous system to the known presence of another person , and misinterpret that as actually feeling an emanation from the other person.
Ever sit close to an attractive stranger on the train? Feel anything? Of course you do- but is what you felt an internal response to the stranger or reception of an emission from the stranger? There's a worldview paradigm shift in how you answer that question.
I'd like to see simple blind tests of whether a reikologist can actually detect the presence of someone behind a screen on a better than chance basis. I would expect any effect (no matter how honestly believed in), to vanish.
forums.randi.org/showthread.php?t=61429
Me like :)