Via Jennifer, I stumbled across an outstanding tutorial on creating a "Reviews" sideblog using MovableType and the MT-Amazon plugin (and a little code-fu, too!)
Martin has created one of the most detailed, easy-to-follow MovableType tutorials out there. Without this tutorial, this might be a four-hammer kind of project (meaning you better know what you're doing). But, with this as a roadmap, I really think this is something that everybody can enjoy. I really like the idea of creating the catagories to represent the "stars: for each review! I'm just sorry it took me so long to happen on this awesome guide!
PS – Looks like Christine knew about this way back when. Dang! I'm such a flake.