Oh how I wish I could place sticky notes on (or somehow add comments to) objects within the Browser. It could be an Add Note item in the menu that pops up when you right click on the object. There could be some small icon that appears with the object icon that lets you know that there's a note for the object and clicking on the icon would pop up the note. Or at the very least, when you hover over the object there could be some indication that there's a note for the object and the right-click menu would include a Note menu item that brings up the note.
