Is there a way to change the 'portal layout' for guests? I have a private board, and users are concerned that their shout box posts can be seen by the world and/or google. I could find no other way to completely disable guest access other than limiting each forum.

Some of the info in a similar thread I started will probably help:
http://www.ubbcentral.com/forums/ubbthreads.php/ubb/showflat/Number/184025

I haven't found a way to totally remove the shoutbox for guests though; you can stop guests from seeing the "shouts" but not the actual shout box itself.

I believe the shoutbox is handled differantly than the calendar script in regurds to the member only ticks; I know theres a way to make it show regged only but not offhand.