Rotten Tomatoes is a great site because it takes all the movie reviews from around the web and condenses them into an easy-to-understand aggregate score. But let's be honest: Most movie reviewers suck. Why not instead rely on people in your social circle to recommend movies to you? That's the idea behind FlixUp . This new iPhone app unveiled at our Realtime CrunchUp event in San Francisco today essentially scans Twitter for what people are saying about a movie and shows you a rating based on that. It can return a general score from across Twitter, or the tweets about the movie from people you follow on Twitter.