Rich Text Pop-up

Rich Text Pop-up

Hello Experts!
I have a well organized report (a List) which shows a series of records with specific sorting and grouping.  Users started asked me if they can add notes to specific records with specific messages.  This would be easy to accomplish with a multi-line or a rich text box.  The problem is that when I add the notes to the table, the table starts looking weird with some record taking just one line and other taking huge space to accomodate the notes.
Ideally, when I look at the list, it would be great to just have a column that says whether the record has notes.  If yes, it would be great if you can open the notes as a pop-up window.  In this way, the table of records will look like it is today with the simple addition of a "Notes Flag" column.
Any idea on how to accomplish this?