http://www.kids-in-mind.com
This is a wonderful site that breaks down a movie to determine how “kid friendly” it is. It really does a great job categorizing and rating the sexual / nudity levels, profanity levels, and violence / gore levels in countless films to include a lot of current new releases.
As a father of three I find this site to be invaluable in determining what movies my children can or cannot watch unattended or even with supervision.
edit: cut and paste below from the site's home page to give further detail.
"HUH? WHAT IS THIS?
We enable adults to determine whether a movie is appropriate for them or their children, according to their own criteria. Unlike the MPAA we do not assign an inscrutable rating based on age, but 3 objective ratings for SEX/NUDITY, VIOLENCE/GORE & PROFANITY on a scale of 0 to 10. We also explain in detail why a film rates high or low in a specific category, and we include instances of SUBSTANCE USE, a list of DISCUSSION TOPICS that may elicit questions from kids and MESSAGES the film conveys. Again, unlike the MPAA, we do not make age-specific recommendations. Since our system is based on objective standards, not the viewer's age or the artistic merits of a film, we enable adults to determine whether a movie is appropriate for their children according to their own criteria. As we never tire pointing out, we make no judgments about what is good or bad or anything else. We do not "condemn," "critique" or "criticize" movies. And we don't "praise" or "recommend" movies either..."
If you have kids and want to monitor what they are watching without having to sit through the movie this is a great site to visit. (make sure to use a popup blocker though)