With Bayesian average (http://news.ycombinator.com/item?id=1219154 http://news.ycombinator.com/item?id=1219154 , http://wiki.answers.com/Q/What_does_true_Bayesi

With Bayesian average (http://news.ycombinator.com/item?id=1219154 http://news.ycombinator.com/item?id=1219154 , http://wiki.answers.com/Q/What_does_true_Bayesian_estimate_mean_in_connection_with_the_IMDb_Top_250_ratings http://wiki.answers.com/Q/What_does_true_Bayesian_estimate_m...) you can easily put a slider saying how much the missing votes count (or how much preference do you give to items with more ratings).