I got this from reading LutherQuest (sic), I confess.
Holy Trinity Society
Taken from that link the following:
"Members of the Society are ordained ministers who hold public office in churches that are not in communion with one another. Yet we drafted and subscribed to a Rule that commits us to celebrating the Lord’s Supper together precisely because ministers of the Word and the Sacraments also need to be fed with the Word and the Sacrament."
The communion service at Concordia, Ft. Wayne, featured LCMS, ELCA, and supposedly one WELS pastor. ELCA women pastors participated, but WELS says there is nothing in the Bible against ordaining women (Brug, Wisconsin Lutheran Quarterly).
LCMS SP Kieschnick communes with ELCA, too. The seminary president will get a severe post card and a case of beer for this slip.