Feedback (collaboration) reports on Nimbus

We have hundreds of storyboards and have just allowed a very small number of end users to begin providing feedback on them through the web viewer (using the collaboration pane on the right hand side of the window).  The help function says:

"The content owner will be notified of the feedback. Other users can also view and reply to your feedback."

Unfortunately, we don't have email notifcations turned on.  Does anybody know whether this notification to the owner manifests itself anywhere onthe system or web viewer?  Also, is there a report I can run for collaboration posts from end users?

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