I see from the demo that you can require that someone be logged in before they add a review (which would tend to discourage spam posts, since I'd know who added the review if it was inappropriate?) Can it also be required to be logged in before rating a link?
Also, I see that when you add a review, you also indicate a rating? Is that rating factored into the over all "stars" shown with a link listing?
Resources for the Solo Entrepreneur Lifestyle
http://www.solo-e.com -- "...because it's not just about the business!"