I have a BB Bold 9000 (white). I have NO idea where to find my pin so people can add me to Blackberry messenger. I looked everywhere. Seriously. It's not in the 'options', if you're wondering.
in any screen that you can type text in, type "mypin" without the quotes, and then press space bar, and it'll change to your pin number, this can be done with your phone number(mynumber) or your OS version(myver).