There is a way to track what the buzz is about a movie - but first I'd like to make a point - when you formulate a question make sure whatever you are asking is clear not only to yourself but also to others- avoid using abbreviations that are specific to your field - I d'dn'nt know that IMDB stand for the Internet Movie Data Base and I had to look it up.
As far as your question is concerned you can use the web site indicated by yoavdothan and follow the buzz with <a href="http://www.google.com/trends">Google Trends</a>.
With Google Trends you can identify the search trends for names of movies or actors.
A high number of searches for a movie indicate a probable box office success ;-)
Sante