www.rottentomatoes.com, it's a great movie resource, and i use it every time I'm interested in watching a movie. I usually agree with their consensus, so it works out for me.

also, if you guys have never seen it, there's a great 30 minute movie critique show on Current. it comes out every Thursday (i'm going to watch in 30 min). I think it's totally worth the 30 minutes, even if you don't go to the movies on the weekends

the show can be viewed online here - http://current.com/the-rotten-tomatoes-show/