Lesson 3 is now on my blog. Discusses the visions of the Tree of Life of both Lehi and Nephi and compares/contrasts them. Discusses Mary as a symbol of Asherah as the wife of God and mother of Christ, etc.
http://joelsmonastery.blogspot.com/2011/12/book-of-mormon-gospel-doctrine-lesson-3.html
Read there / comment here!