Will I be notified when a collaborator comments on a file?

Yes.

In the left-hand sidebar of your Nomono Workspace there is an Activity link. Click here to view recent comments and replies on your files.

You can also choose to receive an email summary of recent comments and replies at intervals of 1 hour, 4 hours, 12 hrs, or 24 hrs. You can enable these summaries and adjust their frequency by navigating to Settings > Profile and scrolling down to Communication Preferences.