Here's a useful suggestion that should be dead easy to implement.
In Second Life, the profiles include a UI tab called "Notes", where one can type in comments regarding each individual we encounter. These notes are visible only to the user, and are really handy for tracking where we met, mutual friends, birthdays, ingame info, etc.
I've seen peeps on my friends' list here whom I haven't spoken with in months, and often struggle to recall their 'story'. A Notes tab would be so useful.
And as the code already exists for us to edit our profile info, adding a UI tab set to private seems easy-peas to me, from my somewhat limited experience with javascript, C+ etc.
Anyone concur?