Evan,
Well, the Sauromatum you sent me has thrown up two leaves but no bloom. However, the two S. giganteum I got from Plant Delights both bloomed, one after the other, and I did four crosses using my Typhonium hybrids. In about a week, I'll know if it worked. Until then, may the Goddess of Blessed Pollination look favorably upon my efforts!
LariAnn