WhatIsOnNetflix is a great website that ranks Netflix movies in descending order of their IMDB or Rotten Tomatoes ratings. It’s updated once a week, and lets you drill down by genre, as well as search for a specific movie. Also, you’re able to click on each movie and be taken to its page on Rotten Tomatoes or IMDB.
It’s little limited since it shows you the top 50 movies or so, and doesn’t access lower rated stuff, but that’s ok, because why would you want to watch that anyway? Right?
In any case, check it out.