Evaluation_Rank_of_an_Individual_Review = ( Author_Status_Level + (avg_num_evals * avg_eval) + (this_num_evals * this_eval) ) / (avg_num_evals + this_num_evals)

Legend:

   * Author_Status_Level: The status levels that a review's author has reached. 

   * avg_num_evals: The average number of evaluations of all reviews that have num_evals>0

    * avg_eval: The average evaluation of every review (again, of those that have num_votes>0)

    * this_num_evals: number of users who evaluate a review

    * this_eval= (Sum of all of the Eval_Status_Levels of positive evaluators of a review) - (Sum of all of the Eval_Status_Levels of negative evaluators of a review)

    * Eval_Status_Levels: level that an evaluator has reached when they make a review

How we want to order items on the review discussions pages:  

Evaluation Rank for a Review Discussion Thread: combines the Evaluation Ranks of all of reviews in its thread.  These should be precalculated so that they can be easily combined.  

Evaluation_Rank_of_a_Review_Discussion_Thread = average of the Evaluation_Rank_of_an_Individual_Review for this review and all of those reviews that descent from it.

Also, we want to throw in a completely random wildcard as the fifth review listed on the page just to keep things fresh.