Dan Peterson just gave a fireside on the Witnesses of the Book of Mormon:
Lethbridge YSA Stake FHE: The Witnesses (it starts at the 6:49 mark)
Other resources on the 3 and 8 witnesses include:
Richard Lloyd Anderson, Investing the Book of Mormon Witnesses (the book on the issue)
Matthew P. Roper, Review of Jerald and Sandra Tanner, Mormonism: Shadow or Reality? (pp. 170-76)
Of course, I am sure a certain individual will dismiss the above resources and others as the 3 and 8 witnesses were not experts in ancient scripts and metallurgy, so could not ascertain, with 100% scientific certainty, that the plates were indeed authentic. Such is the same attitude of the faithless Jews in John 14 who would dismiss Christ no matter what.
