I promised somewhere on the forums a while back that I was making progress on putting together a contrib for an LDAP address book.
Daniel Tan has a contrib that was last reported to work on 5.6 - After some serious hacking I managed to get parts of it working. This encouraged me to look further into the whole thing.
In the course of research I came upon the sourceforge project
http://phpldapadmin.sourceforge.net/ which is *excellent*
If you want to play with LDAP structures, or even just want to hack around and learn some more, this is an excellent piece of kit, that easily installed in an ibay.
Im a Thunderbird user
http://www.mozilla.org/products/thunderbird/ and want my address book to work with it. However, it does not appear to work with the Unofficial Mozilla Schema that is knocking around. I can't find the schema it does use, so in that respect I have kind of hit a wall.
PHPLDAPadmin has a nice function for defining templates for creating new objects/displaying based on schemas. Once I know the schema for thunderbird, I plan to build some templates for creating these objects. then the relevant sections can be added to the server-manager and bob's your uncle, a nice Address book contrib.
If anyone knows the Thunderbird schema, please mail me (richard.gray@bigfoot.com) If anyone thinks a better schema exists, mail me.
Off to go hack some squidguard code

R