directory - logged in users
support - logged in users with admin rights
forums - logged in users
Real world application = 0
and I would also like to point out a further irony ... the chat plugin for the longest time did not allow private chat only group chat...
it seems none of these plugins utilize the approach used by wpmu on this site... surely that rings an alarm bell for the developer when brain storming??
Or is it a case of just outsource it and see what comes back?