CompareMyDocs.com is a document comparison Web service where users can compare, recombine and even merge multiple versions of a document with no sign-up or registration requirements.
CompareMyDocs gives you the freedom to send the same document out to everyone you want feedback from at one time, upload each version they send back to you, and then compare them all simultaneously in one view. Each editors changes are color-coded so users can rule out or accept one persons contributions entirely with a single click, and merge into one final document.
Questions like, Who has the latest version? or, Who has made which changes? will soon become obsolete - its all there, in one place.