This is a plugin for FARR that utilizes the Comparer tool
written by fenixproductions for the recent NANY 2009 event.
Essentially it adds a right-click context menu item to any result that will give you info on the file; by installing additional wdx total commander plugins you can get even more info for specific kinds of files. See the link above for more info on that.
You can also use +cmpc in your search string to trigger the info display without using the right click.
Screenshot:Comparer File Info Plugin for FARR, uses total commander wdx plugs for file info