Go on tools -> track changes.. there is something called "Reviewing Pane"..this should show you the different changes made by all reviewers.
I have a document that has been returned to me from a number of people with comments/additional text. I would like to make one document that shows all the comments/ additional text from the different people. Is this possible?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic