I just mentioned this on the other thread ( http://www.jivesoftware.org/community/thread.jspa?threadID=15962&tstart=0 ) but the subject line there doesn’‘t mention disco, so I figured I’'d repost it.
I just threw together a version of Smack which is more flexible, in several ways which I need. The most straightforward of these is the ability to send a JEP-0128 form when replying to a disco#info query. If this is useful to you, see the thread linked above.