Matt Haughey runs MetaFilter, a community weblog that points out what people feel is the best of the web. In his presentation, he shows off the administration tools available to moderators of the site, and one of them is the ability for moderators to add notes about users. An example as to when they find this useful is when a user all of a sudden seems belligerent, then the moderator can find out more, and maybe the person just lost their job recently, so the moderator can make a note to that effect since maybe they'll cool down on their own.
How would this work in Drupal's case?
each note would have to have the user ID, note text, and timestamp of the note as its data
where to store the note?
what if the profiles are nodes using Content Profile?
is each note a node?