No way! Shoutboxes kill forums. If you add a shoutbox, what is the point of the forum?
I am on a lot of popular design forums and none of them have shoutboxes for that reason.
i personally think shoutboxes defeat the whole idea of a forum
when a visitor comes in and sees everyone posting in the shoutbox and not the forums, they might not want to join
also that is the easiest place for someone to start a flame war
and if someone visiting saw that i dont think they'd be too impressed at 2 people fighting on over a shoutbox
of course its not my decision but i dont think it is necassary
in a perfect world where everyone got along, then yeah.
but if you think this is a perfect world, you need to wake up and smell the flowers