This is probably one of the best movie description sites available. Although the reviews are presumably written by Americans and therefore contain American perspectives, this may stand to reason, given that so many movies are American. If you are after a basic outline of what a film is about, then I would recommend this site. It also contains a review of the film - this review will be inevitably tinged with the reviewer's personal tastes and prejudices. Nevertheless, one assumes that these people have some idea of what they are talking about. As a non-American, I am interested in what Americans have to say about American films, but I would also be interested in hearing what non-Americans have to say about American films, not to mention what non-Americans have to say about non-American films.
As the obvious starting point, the main page of AMG contains a people finder, film finder, quick browse, glossary and essays about film genres and other curiosities. However, the aspect of this site that I find most helpful is the individual descriptions of the movies themselves. These pages contain quite substantial information about the film, from its cast to its box office takings - these details may help the reader to see how the film fits into a broader genre. In the light of this, the lists of similar movies in the genre is quite interesting. You can even rate the film yourself, if this takes your fancy. Given the hold that Hollywood seems to have on global consciousness, it's nice to know that you can take a critical look at the substance (or lack thereof) behind the hype of an individual film. The All Movie Guide is related to the All Music Guide and the All Game Guide. All three of these websites are very informative; whether you are an entertainment freak or an entertainment guru.