The webinar from last Sunday is now on youtube:
We had some good questions and conversations!
BTW, I hear more and more about the two sets of plates as an accepted explanation for the coming forth of the Book of Mormon. It makes sense because it explains the various historical accounts. Plus it shows that Joseph was actually translating the engravings on the plates.
If he wasn't using the plates (as the SITH sayers and Mormonism Unvailed claimed), then he not only wouldn't have needed the two sets of plates, but he wouldn't have any idea which plates the stone-in-the-hat was supposedly translating.