What Mormons Believe

In addition to agreeing on the importance of taking an extremist approach to Iraq in our latest Bloggingheads, Matt and I are awfully hard on the Church of Jesus Christ of Latter-Day Saints. And it occurred to me afterward that, unlettered rube that I am, I've never read a comprehensive defense/explanation, by a smart Mormon, of their church's (seemingly-fantastic) beliefs about the prehistory of the Americas. Such a thing must exist, and so I'm hoping that someone - maybe Russell Arben Fox, maybe the larger gang at Times and Seasons - can point me in the right direction.