Is it possible in SharePoint 2010 (Foundation) to have a list with columns: A, B, and "My Notes". Where columns A and B are consistently displayed the same for all users, but the "My Notes" column is user-scoped? Meaning I'd only see my notes and you'd only see your notes?
I don't mind building custom content types, etc. Perhaps introduce another "hidden" list that contains a User ID and the associated note, then somehow look up and display only the note for the current user/list?
I am trying to break down the problem of building my own "Rating" system (thumbs up / thumbs down) for custom list items. I believe that user-scoped fields (e.g. the "My Notes" example) could be one component of such a system. Any guidance would be greatly appreciated.