I've created a new branch for the addressbook outliner work On this branch, I'm rewriting the results pane from tree to outliner, removing the card datasource, and cleaning up the addressbook code.
It's a big performance win. See http://www.sspitzer.org/ab.html for addressbook bugs fixed on the branch and known issues that I needed to finish before the branch lands. I'll post again when there's branch builds available for testing. -Seth
