Yes, I'm using your fork version 4.5 from launchpad autobuild for ubuntu.
I have already managed to get work e-mail through tor with .onion domain resolution routed by proxychains.
However jabber s2s somehow pass dns queries some other way. I don't understand, what is a difference in using proxychains for firefox, pidgin, smtp and for jabberd2-s2s. First applications just works and send dns queries through Tor. And jabberd2-s2s doesn't. Why, don't you know?