WARNING: Extremely vague and possibly useless references below. Proceed with caution....
I remember reading about a doctor in toronto (a brain surgeon, I believe) who had some kind of ailment (back pain?) that had pretty much defeated modern medicine. Although skeptical, he tried acupucture at the behest of a friend, figuring he had nothing to lose. It helped him immensely. Now curious, he set to study why. He was going to do a study of how acupuncture affects certain areas of the brain. He had some preliminary results that showed acupunture techniques having the same success (in terms of measured activity in the brain) as other therapies for whatever ailment he was studying.
I haven't been able to dig up any kind of report or refernce about this now, however. It may not have been a double blind experiment, but at least the effects are being measured more objectively rather than simply asking the patient.