The shoutbox, Sb for short, is, like Draco said, a chatroom.
You can go in there anytime and chat with smilies and text.
There r rules in there and when u open it up, near the
bottom there is a list of all the online members(their name
does not show up if they choose to be hidden). You can chat
in SB and unlike pms, more than one member can be in it,
also, its quicker and easier^^(the rp box is basically the
same, but you can act out your char)

Sort of like a chatroom, a place to go where everyone on the
site can go and chat with each other. It's a good way to
meet people on the site, and make friends.