Here are a couple links that my searches have brought me across that I hope are helpful to some.

http://www.datafriend.com/timc/find.html

http://www.rottentomatoes.com/

Or Google the movie using "movie:" before your search (without quotes of course)

I'll ditto the 2nd one: RottenTomatoes is what I rely on fairly frequently.

Board: I Need To Know - IMDb (http://www.imdb.com/board/bd0000001/threads/)

Recent questions without answers - NameThatMovie (http://namethatmovie.org/unanswered)

What's That Movie? (http://imadork.hubpages.com/hub/Whats-That-Movie)