badabugs
Only two things : we can't set number of messages showing in the shoutbox in panel admin ... and we can't set a delay to empty the history ... The last problem is that i don't know how to connect my CB profiles on shoutbox's profiles ...
Great job.
You can set the messages to show, in the admin, in "Messages to show".
You can also set the limit of message to save and how many messages show in the history.
And, you can connect the profiles with CB in "View profile" > "Community builder"
This options are in Joomla Admin > Kide > Preferences (top-right, next to the buttons Save, Cancel, ect)

