As far as the Shoutbox goes, I set mine to 5 to be shown so it does not expand too much vertically, in anyone wants to view more than the 5 shown they can click on the history, that have set 20 to 50 depending on how much the module is being used! the history can be set by going to the: Admin > Ezportal > Settings > Shoutbox setting >"Number of items to show per page on shoutbox history" > from field!
Before and under this you may find additional Shoutbox settings!

regards,
Maxx