This is Story Turbo as an Office app, with extra benefits
April 1 2014: The Notes With Links Office Store page is down for maintenance as the price is changing, this is not as simple as it sounds (this is not a joke btw!). I will email members when the new version is live.
WHAT DOES IT DO?
Multi-user
Notes With Links has panels for notes so you can collaborate and share when reviewing a document, or just use them for arrangement. Use for editing with others, marking, commenting, reviewing, sharing. Or just organise your own notes better, using separate panels.
Active reference links
It has active reference links from places in your documents to the particular note.
It works with Word, Excel and (some limits) PowerPoint as a side panel app, and is saved with the document.