It seems that the placebo effect has been the source of ongoing discussion and sometimes controversy at the huge web discussion community Metafilter. A friend pointed out this post, and the discussion it provoked, and we consequently discovered Metafilter discussions here, here, here, here, here and here! Popular topic! Scrolling through the discussions, we were happy to find that most of the points raised have been addressed, in one way or another, on these pages. Check out our search function!