In reply to Peter Nermander's question: The advantage of using one source, with multiple collaboration copies, is that you end up with a single version for final publishing. The author retains control of the document, while enabling input and feedback from others on the content and even layout.
I want to note that whatever authoring tool one uses, exporting to PDF for comments is usually a very efficient and reliable way to give a view and gather feedback. PDF is an international standard, so everyone you share with will see the same page view. When you use PDF tools that deliver PDF standard comments and markup, you're insured to be able to read other's input. Full disclosure, I am an advocate for PDF as my employer, Qoppa Software, specializes in PDF software for developers, end users, and data administrators. Thanks. *Susan Sims
