playBunny: I haven't used it, but if you go to your profile page, there is a box labeled "access code" or something like that. If you haven't used it, it will have an empty box next to "reset". Put a check mark in the box, then click "reset", and it generates a code.
As far as what you do with the code, I have no clue! But I'm pretty sure that is what he is talking about.
(hide) If you want to save on bandwidth you can reduce the amount of information that shows up in your pages in the Settings. Try changing the number of games in the main page and the number of messages per page. (pauloaguia) (show all tips)