LDAP White Pages Plugin
A plugin that makes hyperlinks out of (ldap stored) usernames, and provides some meta information stored in the ldap directory about the users.
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Download the zipped source from here.
In conf/trac.ini add this line to the components section:
ldapwpplugin.* = enabled
and add this stanza somewhere else (like on the bottom of the file)
[ldap-wp] ldap_uri = ldap://localhost ldap_user_rdn = ldap_user_filter = objectClass=posixAccount
Note that these values are the defaults so if these are good enough you won't have to add this part.