Michael Tymn offers an interesting perspective on ectoplasm and those fake-looking photos of mediums like Helen Duncan and Eva C.
I've argued that these photos are prima facie evidence of trickery and deceit. Michael suggests another way of thinking about it.
The Daily Grail points to some disturbing comments made by arch-skeptic James Randi in a recent interview.
For a detailed discussion, see the book "From Darwin to Hitler," by Richard Weikart.
FYI, there's a new interview with Chris Carter at the Skeptiko site: