I like the moderation feature, especially the Objectionable Word option. However I would like discussions and messages to be posted directly without the "A moderator will review your new discussion topic." page popping up. How can I do this?

This requires modifying various macros from standard.tpl (webxStd-local.tpl for v5.0+). Please see your documentation for further information on WCTL and standard templates.

Messages:

Edit the standard template "addMessage". To have moderated messages
that do not contain objectionable words post directly (instead of
going through the normal approve/edit form), add the following to
the addMessage form: <input name=postDirect type=hidden value=true>

Discussions:

Edit the standard template for "addDiscussion". Place
<input type=hidden name=approve value=approve>
right after the <FORM...> in all locations where it appears.