As anallawalla says, you can send a stickymail to the moderator of the forum and cc it to the relevant Category Administrator (see the top of each section): Category Admins:
The Webmaster World
Category Administrator tedster [webmasterworld.com]
The Marketing World
Category Administrator WebGuerrilla [webmasterworld.com]
The Search Engine World
Category Administrator DaveAtIFG [webmasterworld.com]
Local
Category Administrator Brett_Tabke [webmasterworld.com]
Private (Subscribers) Forums
Category Administrator engine [webmasterworld.com]
