Rotten Tomatoes is a great site for getting movie reviews on both current and video movies.  They consolodate all the top movie reviewers and list their reviews creating a realistic view of what people really think.  You can also find local movie listings.

In a nutshell, Rotten Tomatoes offers a fun and informative way to discover the critical reaction on movies from the nation's top print and online film critics, neatly summarized via the Tomatometer™.  Which is sort of funny - the concept of throwing virtual tomatoes at a rotten movie kind of rocks.   I like how they list all of the reviews and then put up the results as whole.  You can also read all of the reviews.  It's just a more straightforward way to choose movies you want to see.

There is even a price comparison feature for DVDs, soundtracks, video products, and stuff like that.  Two thumbs up.  :)