[PowerBlade]

What this hack does is connecting to the irc server every time a new post or a reply has been made (configurable) in specific forums
you can choose up to 3 channels different channels to join depending on the forum the post was made in
The bot then connects to irc, joins the channel, tell people in there a new post was made, and quit's again.
When you click the submit button the server must connect, send message, quit to the irc server, before the user can continue to his post.
So this will be a bit longer.
The nice part about eggdrop (if you want to) is the script simply needs to throw the data in the db, and a dedicated bot reads it from time to time. This is much faster than this, but this is possible on non-dedicated server.

btw.. this does not add the "who is in irc chat"