LDAP / log level

This is my first post to the list. Let me begin by saying I think XWiki is very very cool. I have 2 questions. 1. Is there a place I can look to find more info about setting up XWiki to use LDAP for authentication? I looked at http://www.xwiki.org/xwiki/bin/view/Dev/LDAPIntegration and link specific to active directory. I'd like XWiki to simply check passwords against our LDAP server but do nothing else with it (like trying to add users in it etc.). I looked at the LDAPAuthServiceImpl.java source, but wasn't really able to make anything out of it. 2. How do I enable logging and turn up the log level in XWiki? I'll try to aggregate whatever helpful answers I get and add them to xwiki.org. Thanks, --Craig