Allow people to become watchers of a prototype
Allow people to become watchers of a prototype so when the document is updated they could get updates to check it out.
Bonus points if it can highlight what's new.
This would be great because I'm working on something and my manager works remotely and feeding back as i'm working. I'f she and others were notified when it gets updated then it would save me a manual email every time I make a change.