A panic button.
A clock with selectable time zones.
A live stream of the NG office.
Most popular thread of the day/week.
An interactive hamster on a wheel.
Fridge magnets.
A graph showing the rise and fall in the amount of logged on users.
Funniest/weirdest/most random post of the day/week.
A fish tank.
Link to a random flash/audio/profile/page on the site.
A BBS monitor to alert you when a new thread is made (Same idea as Portal Guard but for the BBS).
Classic arcade games (Pac-Man, Space Invaders etc)
.gif of Poozy swinging his dick around whenever he's online.
A pie chart showing the ratio of male to female users.
Most watched audio/flash of the day.
An awesome yay face that changes expression every time you move your cursor over it.
Even if none of the above things happen, that little corner should be used for something...